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AEO vs GEO vs LLM SEO: The Terms, Honestly Explained

Updated September 2026 · Written and maintained by the Progression Agency strategy team

Six competing labels, one underlying practice, and no standards body defining any of them. Here is what each term actually means and where the real differences are.

On this page · 20 sections
  1. What is the difference between AEO, GEO, LLM SEO and AI SEO?
  2. Are these actually different services, or the same thing renamed?
  3. What does each term mean, precisely?
  4. What are the underlying concepts worth knowing?
  5. If the deliverables overlap, what actually differs?
  6. Where did all these terms come from?
  7. Why does the confusion persist?
  8. How should a buyer navigate this?
  9. Which term should you use internally?
  10. Does any of this replace SEO?
  11. What vocabulary do you need for measurement?
  12. Do the terms mean different things on different assistants?
  13. Does the terminology change by industry?
  14. What are the most common misconceptions?
  15. What are the warning signs in a proposal?
  16. What evidence should you expect to see?
  17. What does a sensible first quarter look like?
  18. Who in the business asks which question?
  19. Where does each term show up in real buyer language?
  20. Video: search, AI and measurement

The short answerAEO, GEO and LLM SEO describe substantially the same work under three names, with differences of emphasis rather than of kind. ‘AI SEO’ has no fixed meaning and varies by vendor. ‘AI visibility’ is an outcome, not a method. Only classic SEO is genuinely a different discipline, because it competes for a ranking position rather than for being quoted. Judge any proposal on its deliverables, never on its acronym.

Updated September 2026. We run this work and publish under two of these labels ourselves, so treat this as disclosure rather than neutrality.

Search demand behind each term
Ubersuggest, United States. Demand is split across synonyms, which is the whole problem.

What is the difference between AEO, GEO, LLM SEO and AI SEO?

Almost nothing, in practice. AEO, GEO and LLM SEO describe substantially the same set of activities under three names. ‘AI SEO’ has no fixed meaning at all. Only classic SEO is genuinely a different discipline, because it competes for a ranking position rather than for being quoted.

This page exists because the vocabulary is a mess and the mess is expensive. Six labels compete for roughly one practice, none of them defined by any standards body, and the ambiguity lets the same work be sold three times to the same buyer. We run this work and publish under two of these names ourselves, so treat what follows as disclosure rather than neutrality.

Do the terms describe different work?
The bottom three are how the confusion gets monetised.

Are these actually different services, or the same thing renamed?

The same thing renamed, with differences of emphasis rather than of kind. Roughly 80% of the deliverables overlap across AEO, GEO and LLM SEO engagements.

Where they genuinely differ is in what each label draws attention to. AEO puts the weight on answering a question directly enough to be quoted. GEO puts it on appearing inside a generated summary. LLM SEO puts it on being retrievable by a model at all. Those are three views of one pipeline, not three pipelines.

The terms, defined and separated
TermWhat it literally meansCompetes forGenuinely distinct?
SEOSearch engine optimizationA position in a list of linksYes
AEOAnswer engine optimizationBeing the quoted passageYes, from SEO
GEOGenerative engine optimizationPresence in a generated summaryMostly overlaps AEO
LLM SEOOptimising toward language modelsBeing retrievable by a modelOverlaps AEO and GEO
AI SEOUndefined; varies by vendorVariesNo
AI visibilityThe outcome, not the methodNothing — it is a resultNot a method at all
Conversational searchSearch conducted as dialogueNothing — it is a behaviourNot a method
AEO — Term. Answer engine optimization — being the quoted answer.
GEO — Term. Generative engine optimization — presence in generated summaries.
LLM SEO — Term. Practitioner shorthand for optimising toward language models.
AI SEO — Term. Vendor-defined, varies widely, often means nothing specific.
AI visibility — Term. The outcome rather than the method.
Conversational search — Term. Search conducted as dialogue rather than queries.

What does each term mean, precisely?

Six labels, defined one at a time, with the distinction each one is actually trying to draw.

We have written these definitions to be quotable rather than hedged. If an assistant uses this page to answer ‘what is the difference between AEO and GEO’, the answer above is the one we want it to take.

Answer engine optimization (AEO)

Work to make a business the source an assistant quotes when answering a question. The emphasis is on direct question-answering: the answer sits immediately after the question, in language close to how the question was asked. The term predates modern assistants — it was used for featured snippets — and was revived when the same problem returned in a harder form.

Generative engine optimization (GEO)

Work to appear inside answers composed by a generative model. Named in a 2023 academic paper, which is why it has the most formal pedigree of the group and the highest search volume. In commercial use it is indistinguishable from AEO.

LLM SEO

Practitioner shorthand for optimising so that large language models can retrieve and use your content. Tends to emphasise the technical side — crawler access, rendering, structure — over the editorial side. Rarely used by buyers; common among people doing the work.

AI SEO

No fixed meaning. Some vendors use it for the work described here; others use it for using AI tools to produce ordinary SEO content, which is a completely different activity. Always ask which is meant before agreeing to anything.

AI visibility

An outcome, not a method: the degree to which a brand appears in AI-generated answers. Useful in a boardroom because it names the result. Useless in a scope of work because it describes no activity.

A user behaviour rather than a discipline: searching by asking questions in natural language, often across several turns. It is the reason the other terms exist.

Answer engine — Term. A system returning a written answer rather than links.
Generative search — Term. Search results composed by a model.
AI Overviews — Term. Google's generated summary above the organic results.
RAG — Term. Retrieval-augmented generation — fetching sources before answering.
Grounding — Term. Constraining an answer to retrieved passages.
Attribution — Term. Surfacing some sources as visible citations.

What are the underlying concepts worth knowing?

Answer engines, generative search, AI Overviews, retrieval-augmented generation, grounding and attribution — the mechanics the marketing terms sit on top of.

Understanding these makes the vocabulary arguments mostly evaporate, because you can see that every label is describing an intervention at one of the same four stages.

Answer engine

Any system that returns a written answer rather than a list of links. Assistants are answer engines; so was the featured snippet, in a primitive way.

Search where the result is composed by a model rather than selected from an index. Google AI Overviews is the highest-volume example.

Retrieval-augmented generation (RAG)

The pattern where a system fetches relevant documents before generating an answer, so the answer is grounded in sources rather than recalled from training. Almost all citation behaviour depends on this.

Grounding

Constraining the generated answer to the retrieved passages. When grounding is strong, citations are meaningful; when weak, the model drifts toward recalled knowledge.

Attribution

The step where some sources become visible citations. The least predictable stage, and the one every vendor guarantee quietly depends on.

How passages are matched by meaning rather than exact wording. The practical consequence is that answering in the user’s language matters more than repeating a keyword.

Retrieval — Term. Gathering candidate passages before an answer is written.
Embedding — Term. A numeric representation used to find related passages.
Vector search — Term. Finding passages by meaning rather than exact words.
Entity — Term. The machine-readable identity of a thing or organisation.
Knowledge graph — Term. A structured map of entities and their relationships.
Corroboration — Term. Independent sources asserting the same fact.
Where the emphasis differs
1 = light, 3 = heavy. The differences are of emphasis, not of kind.

If the deliverables overlap, what actually differs?

Emphasis. AEO weights answer structure and entity clarity most heavily; GEO weights corroboration; LLM SEO weights technical retrievability; classic SEO weights technical health and links.

That chart is the most honest summary we can give. Nobody running one of these engagements ignores the other columns; they simply start in a different place.

Head-to-head: the five comparisons people actually search
ComparisonThe honest answerWhat differs in practiceBuy both?
AEO vs SEODifferent success conditionsPosition in a list vs being the quoted passageYes — SEO underpins AEO
AEO vs GEOSubstantially the sameDirect answers vs summary presenceNo — one engagement
GEO vs SEODifferent success conditionsSame distinction as AEO vs SEOYes
LLM SEO vs AEOSame work, technical framingRetrievability vs answer qualityNo
AI SEO vs AEOUndefined vs definedDepends entirely on the vendorAsk what is meant
AEO vs digital PRDifferent activitiesPR produces the corroboration AEO needsYes — PR is an input

AEO vs SEO

The one genuinely important distinction on this page. SEO succeeds when you occupy a position; AEO succeeds when your words are the ones reused. A page can rank first and never be quoted, because its answer is buried under six paragraphs of context-setting. The reverse also happens: a page that ranks eighth gets quoted constantly because it answers in one sentence.

AEO vs GEO

We publish an AEO page and a GEO page and the deliverables are the same. The reason both exist is that buyers search both terms, not that they buy different things. Any provider billing them as separate retainers should be asked to show what differs line by line.

GEO vs SEO

Identical in structure to AEO vs SEO. GEO is the newer label with the higher search volume, which is why some agencies lead with it.

LLM SEO vs AEO

LLM SEO tends to be how engineers describe the work and AEO how marketers do. The technical emphasis is real but partial: making a page retrievable does nothing if the answer inside it is unusable.

AI SEO vs everything

The term to be most careful with. It sometimes means the work on this page and sometimes means ‘we use ChatGPT to write your blog posts’, which is a different service at a different price with different risks.

AEO vs digital PR

Digital PR earns the third-party mentions that make your claims credible to a model. It is an input to AEO rather than a competitor. Budgets that fund one and not the other tend to stall.

How the vocabulary arrived
No standards body ever defined any of these. The vocabulary grew by accretion.

Where did all these terms come from?

Featured-snippet optimisation in the late 2010s, a 2023 academic paper that named GEO, the revival of AEO as an older term, and practitioner shorthand that produced LLM SEO.

No standards body has ever defined any of them. The vocabulary grew by accretion, which is why it is inconsistent and why arguing about which is ‘correct’ is not a productive use of a meeting.

Same deliverables — Reality. AEO and GEO engagements produce near-identical work.
Different emphasis — Reality. AEO leans on direct answers, GEO on summary presence.
No standard — Reality. No body defines any of these terms.
Split demand — Reality. Search volume is fragmented across six labels.
Vendor advantage — Reality. Ambiguity lets the same work be sold repeatedly.
Buyer confusion — Reality. Most briefs use two of these terms interchangeably.

Want this done for your site?We build and maintain the search, content and paid programmes described on this page.

Get a free proposal

Why does the confusion persist?

Because it is profitable. Ambiguous vocabulary lets the same scope of work be positioned as three services, and lets a provider claim expertise in a discipline that has no definition to fail.

We would rather say that plainly. The practical defence is simple and appears below.

Read deliverables — Rule. Judge a proposal on its list, never its label.
Define once — Rule. Fix the term at the start of a brief and keep it.
Ignore novelty — Rule. A new acronym is not a new capability.
Check overlap — Rule. Ask what differs from your existing SEO scope.
Refuse guarantees — Rule. Nobody controls model attribution.
Measure the same way — Rule. One prompt set, whatever the work is called.

How should a buyer navigate this?

Ignore the label entirely and read the deliverables. If two proposals list the same work under different acronyms, they are the same proposal.

Six rules, all of them cheap to apply, and any provider worth hiring will be comfortable with all six.

  1. Ask the provider to define the term they use, in one sentence, before anything else.
  2. Ask what differs from the SEO scope you may already be paying for.
  3. Ask for the deliverable list, then compare lists rather than labels.
  4. Ask how success is measured and insist on a fixed prompt set.
  5. Treat any guarantee of AI mentions as a reason to end the conversation.
  6. Ask what happens in month four, when the easy technical wins are done.
  7. Ask who does the corroboration work, since it is the slowest and most skippable part.
  8. Agree one vocabulary for the engagement and write it into the brief.

Want this applied to your site rather than explained?

Our answer engine optimization service is the implementation of everything described here.

See the AEO service

Which label to use when
AI SEO is the most recognisable and the least precise, which is why vendors like it.

Which term should you use internally?

Use ‘AI visibility’ with executives, ‘AEO’ or ‘GEO’ with search teams, and define whichever you pick once at the start of the document.

The label matters for two things only: being found by people searching for help, and being understood by the person you are talking to. It should never change what work gets done.

When each term is the right one to use
The label matters for being found. It should not change what you buy.
The vocabulary, at a glance
Six names, one practice, no governing definition.

Does any of this replace SEO?

No. Assistants that lean on a search index cannot cite a page that does not rank, so conventional search health remains a prerequisite for a large part of the surface.

The more useful framing is that SEO has acquired a second success condition. The page still has to be found; now it also has to be quotable. Businesses that treat AEO as a replacement tend to dismantle the foundation the new work depends on.

What changes

Informational traffic compresses, because assistants answer those questions without a click. Commercial traffic has held up better so far, because people still want to compare providers themselves.

What does not change

Crawlability, site health, internal linking, page speed and authority all still matter. Every one of them is also an AEO input.

What to protect

Commercial and comparison pages. They are the ones still earning clicks, and they are the ones worth restructuring first.

What to stop relying on

Top-of-funnel definitional content published purely for traffic. It is the first thing assistants absorb and the first traffic to disappear.

Prompt set — Term. A fixed list of buyer questions used for measurement.
Mention rate — Term. Share of tracked prompts naming a brand.
Citation rate — Term. Share of tracked prompts naming and linking a brand.
Share of voice — Term. Mentions measured against a named competitor set.
AI crawler — Term. A bot fetching pages on behalf of an AI system.
llms.txt — Term. A proposed file declaring site content to AI systems.

What vocabulary do you need for measurement?

Prompt set, mention rate, citation rate, share of voice, AI crawler and llms.txt — six terms that cover almost every measurement conversation.

These are the words that appear in a decent report. If a provider’s reporting uses none of them, ask what is actually being counted.

What each measurement term means
TermDefinitionWhy it matters
Prompt setA fixed list of real buyer questionsWithout a fixed set, movement is meaningless
Mention rateShare of prompts naming the brandThe blunt measure; moves first
Citation rateShare of prompts naming and linkingCorrelates with referral traffic
Share of voiceMentions against named competitorsGuards against a rising tide
Answer accuracyShare of claims about you that are trueSometimes the whole brief
AI crawler hitsServer-log evidence of AI botsThe only unarguable technical measure
ChatGPT — Platform. Mixes live browsing with model knowledge.
Perplexity — Platform. The most citation-dense of the major assistants.
Google AI Overviews — Platform. Draws on Google's own search index.
Microsoft Copilot — Platform. Close to Bing's index and behaviour.
Claude — Platform. Leans on prior knowledge more than live retrieval.
Meta AI — Platform. Limited citation, heavy third-party reliance.

Do the terms mean different things on different assistants?

No, but the work lands differently on each. The vocabulary is the same everywhere; the emphasis that pays off is not.

This is where the label argument becomes genuinely irrelevant and the mechanics start mattering.

ChatGPT

Mixes live browsing with model knowledge, so entity clarity matters more than freshness. Much of what it asserts about a brand predates anything changed this quarter.

Perplexity

The most citation-dense assistant and the most responsive to fresh, well-structured pages. Usually the first place a change becomes visible.

Google AI Overviews

Draws on Google’s index, so conventional ranking health is close to a prerequisite. Not ranking usually means not appearing.

Microsoft Copilot

Close to Bing’s index and behaviour, and frequently overlooked. Often the cheapest incremental visibility available.

Claude

Leans on prior knowledge more than live retrieval, so corroboration matters more than page-level edits.

Meta AI

Limited citation behaviour and heavy reliance on third-party presence. Least addressable through on-site work alone.

SaaS — Industry. Comparison and alternatives prompts dominate.
Legal — Industry. Jurisdiction-specific; generic answers rarely cited.
Healthcare — Industry. Accuracy outranks visibility as a priority.
Ecommerce — Industry. Product and brand-versus-brand comparisons.
Professional services — Industry. 'Who should I hire' prompts with location weight.
Manufacturing — Industry. Specification prompts where being the source wins.

Does the terminology change by industry?

The labels do not, but which prompts matter does, and that changes where effort pays.

Twelve industries, and the prompt family that dominates each one.

SaaS

Comparison and alternatives prompts dominate. Being absent from a ‘best X tools’ answer is the common failure.

Jurisdiction-specific answers. Generic explanations are almost never cited because the correct answer depends on where you are.

Healthcare

Accuracy outranks visibility. A confident wrong answer about a provider is a bigger problem than absence.

Ecommerce

Product and brand-versus-brand comparisons, heavily influenced by third-party review sources rather than your own site.

Professional services

‘Who should I hire’ prompts, usually with a location qualifier. Entity clarity and corroboration carry most of the weight.

Manufacturing

Specification prompts, where publishing the authoritative number makes you the quoted source almost by default.

Financial services — Industry. Regulated claims need corroboration.
Real estate — Industry. Local prompts, entity clarity critical.
Home services — Industry. 'Near me' prompts resolved from local signals.
Education — Industry. Explanatory prompts; best explanation is cited.
Hospitality — Industry. Recommendation prompts, third-party led.
Nonprofit — Industry. Impact prompts; original data scarce and valuable.

Financial services

Regulated claims, so corroboration is effectively the whole programme.

Real estate

Local prompts where entity clarity and consistent listings decide inclusion.

Home services

‘Near me’ prompts largely resolved from map and directory data rather than site content.

Education

Explanatory prompts, where the clearest explanation tends to be the one reused.

Hospitality

Recommendation prompts driven almost entirely by third-party corroboration.

Nonprofit

Impact and mission prompts, where original data is scarce and therefore valuable.

It is just SEO — Myth. Shares foundations, different success condition.
It replaces SEO — Myth. Index-led surfaces still require ranking.
You can buy placement — Myth. No ad inventory exists inside the answer.
More content wins — Myth. Specificity beats volume, consistently.
Schema alone is enough — Myth. Markup contradicting the page is worse than none.
Results are instant — Myth. Technical fixes are; everything else is months.

What are the most common misconceptions?

That it is just SEO, that it replaces SEO, that placement can be bought, that volume wins, that schema alone is enough, and that results are instant.

Each of these is wrong in a way that costs money, and most of them are wrong in the same direction: assuming the new work is either trivial or magical.

‘It is just SEO’

It shares the foundations and differs in the success condition. A page can rank first and never be quoted.

‘It replaces SEO’

Index-led surfaces cannot cite what does not rank, so removing the SEO foundation removes part of the AEO surface.

‘You can buy placement’

There is no ad inventory inside an AI answer today. Anything sold as such is something else.

‘More content wins’

Volume without specificity is the most expensive way to fail. One genuinely best answer beats fifty restatements.

‘Schema alone is enough’

Markup that contradicts the visible page reduces machine confidence in everything else on it.

‘Results are instant’

Crawler fixes are. Structural and corroboration work is months.

Guaranteed mentions — Red flag. Attribution is not vendor-controllable.
Separate AEO and GEO fees — Red flag. Same deliverables billed twice.
No prompt set — Red flag. Nothing fixed to measure movement against.
Vanity dashboards — Red flag. Scores with no stated method.
No server-log access — Red flag. Crawler claims cannot be verified.
Undefined 'AI SEO' — Red flag. Ask what is meant before signing.

What are the warning signs in a proposal?

Guaranteed mentions, separate AEO and GEO fees, no fixed prompt set, vanity dashboards, no interest in server logs, and undefined use of ‘AI SEO’.

Any one of these is a question to ask. Two or more together is usually a reason to stop.

Guaranteed mentions

Attribution happens inside a model no vendor controls.

Separate AEO and GEO fees

The same deliverables billed twice under two acronyms.

No prompt set

Without a fixed question list there is nothing to measure movement against.

Vanity dashboards

A proprietary ‘visibility score’ with no stated method is not measurement.

No server-log access

Crawler claims cannot be verified any other way.

Undefined ‘AI SEO’

The one term that might mean a completely different service.

Server logs — Evidence. The only unarguable record of crawler visits.
Analytics referrals — Evidence. Assistant traffic where it is passed through.
Prompt sampling — Evidence. Repeated measurement of a fixed question set.
Schema validators — Evidence. Confirms markup parses and matches the page.
Rendering checks — Evidence. What a crawler sees without JavaScript.
Brand monitoring — Evidence. Third-party mentions feeding corroboration.

What evidence should you expect to see?

Server logs, analytics referrals, repeated prompt sampling, schema validation, rendering checks and brand monitoring.

No single platform covers all six, which is why reporting assembled from one tool tends to be thin.

Server logs

The only unarguable record that a given AI crawler reached a given page.

Analytics referrals

Assistant traffic where the referrer is passed through. Incomplete by nature, and still worth watching.

Prompt sampling

Repeated measurement of the same fixed question set, which is the backbone of any honest report.

Schema validation

Confirms markup parses and, more importantly, that it matches the page.

Rendering checks

What a crawler sees when JavaScript does not execute.

Brand monitoring

Third-party mentions, which are the raw material of corroboration.

Weeks 1-2 — Stage. Baseline and prompt set.
Weeks 3-4 — Stage. Technical access and rendering.
Weeks 5-8 — Stage. Answer-first restructuring.
Weeks 9-10 — Stage. Entity and corroboration.
Weeks 11-12 — Stage. Re-measurement and reporting.
Quarterly — Stage. Re-check platform behaviour.

What does a sensible first quarter look like?

Baseline, technical access, restructuring, entity and corroboration work, then re-measurement against the same prompt set.

Ninety days is long enough to show movement and short enough to act on. The order matters more than the speed.

Weeks 1-2

Build the prompt set and measure the baseline. Nothing else should start first.

Weeks 3-4

Confirm crawler access and rendering. Restructuring before this wastes the work.

Weeks 5-8

Answer-first restructuring of the pages that should be cited.

Weeks 9-10

Entity definition and the beginning of corroboration work.

Weeks 11-12

Re-measure the same set and report what moved.

Quarterly

Re-check platform behaviour, because it changes underneath you.

CMO — Role. Asks what the business outcome is.
Head of SEO — Role. Asks what differs from existing scope.
Content lead — Role. Asks what changes in the brief.
Developer — Role. Asks what technical work is required.
Analyst — Role. Asks how any of it is measured.
Founder — Role. Asks whether it is worth doing at all.

Not sure which of these applies to you?Tell us the situation and we will say plainly what we would do first, and what we would not.

Talk it through

Who in the business asks which question?

Six roles, six different first questions — and a brief that answers all six moves faster.

Most stalled AEO projects stall because one of these six was never answered.

CMO

‘What business outcome does this produce?’ Answer in terms of influence on the buyer before the click, not referral sessions alone.

Head of SEO

‘What differs from what we already do?’ Usually the honest answer is: the structural rewriting and the measurement, not the technical work.

Content lead

‘What changes in the brief?’ Answer first, then explain. That is most of it.

Developer

‘What do you need from me?’ Crawler rules, rendering, and schema that matches.

Analyst

‘How is this measured?’ A fixed prompt set and five numbers.

Founder

‘Is this worth doing at all?’ Only if buyers research before shortlisting.

‘What differs from what we already do?’ Usually the honest answer is: the structural rewriting and the measurement, not the technical work.

Where does each term show up in real buyer language?

Buyers rarely use any of these acronyms. They describe the problem instead, which is why prompt sets beat keyword lists.

Ten phrasings we see repeatedly, and which label each one maps to.

‘Why doesn’t ChatGPT mention us?’

Maps to AEO. The commonest entry point by a wide margin.

Maps to GEO or AEO interchangeably.

‘Can we optimise for LLMs?’

Maps to LLM SEO, usually asked by a technical stakeholder.

Maps to share of voice, a measurement question.

‘AI is saying something wrong about us’

Maps to answer accuracy, often the urgent case.

‘Is SEO dead?’

Maps to nothing specific, and is usually the start of a real conversation.

‘What is GEO?’

A definitional question, answered at the top of this page.

‘Do we need a separate AI agency?’

Almost always no; the work overlaps your existing scope.

‘How would we even measure this?’

The best question on the list, and the one to answer first.

‘Should we block the AI crawlers?’

A business decision about content rights, not a tactic.

What each role should ask a provider
RoleThe questionA good answer sounds like
CMOWhat outcome does this change?Influence before the click, measured on a fixed prompt set
Head of SEOWhat differs from our SEO scope?Structural rewriting and measurement, not the technical basics
Content leadWhat changes in how we write?Answer first, then explain; one claim per section
DeveloperWhat do you need from us?Crawler rules, rendering, schema that matches the page
AnalystHow is success measured?Fixed prompt set, five numbers, monthly
FounderIs this worth doing?Only if your buyers research before they shortlist

Video: search, AI and measurement

Background viewing on search and measurement. The terminology material on this page is written out in full above; these are context rather than the answer to anything here.

Frequently asked questions

What is the difference between AEO and GEO?
Very little. Answer engine optimization emphasises being the directly quoted answer; generative engine optimization emphasises appearing inside a generated summary. The deliverables of a real engagement overlap almost completely.
Is AEO the same as SEO?
No. SEO competes for a position in a list of links; AEO competes to be the passage quoted inside an answer. They share most of the technical foundation but succeed on different conditions.
What is LLM SEO?
Practitioner shorthand for optimising so language models can retrieve and use your content. It emphasises the technical side of the same work AEO and GEO describe.
Is AI SEO a real discipline?
It has no fixed definition. Some vendors mean the work described on this page; others mean using AI tools to write ordinary SEO content. Always ask which before signing anything.
What is AI visibility?
The outcome — how often a brand appears in AI-generated answers — rather than a method. Useful for describing a goal, useless for describing a scope of work.
Which term should I search for when hiring?
All of them. Providers index under different labels, so searching only one term hides part of the market.
Which term should I use in a brief?
Whichever your team already understands, defined once at the top of the document and used consistently after that.
Do I need separate AEO and GEO retainers?
No. If a provider proposes both, ask them to show what differs line by line in the deliverables.
Who invented the term GEO?
It was named in a 2023 academic paper on optimising content for generative engines, which is why it carries more formal weight than the alternatives.
Is AEO an old term?
Yes. It was used for featured-snippet optimisation well before modern assistants existed, and was revived when the same problem returned in a harder form.
What is an answer engine?
Any system that returns a written answer instead of a list of links. Modern assistants are answer engines; so, in a limited way, was the featured snippet.
What is generative search?
Search where the result is composed by a model rather than selected from an index. Google’s AI Overviews is the highest-volume example.
What is RAG and why does it matter here?
Retrieval-augmented generation: fetching relevant documents before writing an answer. Almost all citation behaviour depends on it, because it is the stage where your page either is or is not a candidate.
What is grounding?
Constraining a generated answer to the passages that were retrieved. Strong grounding makes citations meaningful; weak grounding lets the model drift toward recalled knowledge.
What is attribution?
The stage where some sources become visible citations. It is the least predictable part of the pipeline and the part every vendor guarantee quietly depends on.
Why can nobody guarantee an AI mention?
Because attribution happens inside a model that no agency controls. Work can raise the probability; nothing can fix the outcome.
Does AEO replace SEO?
No. Assistants leaning on a search index cannot cite a page that does not rank, so conventional search health remains a prerequisite.
Is my SEO traffic going to disappear?
Informational traffic is compressing. Commercial and comparison traffic has held up better so far, because buyers still want to compare providers themselves.
What should I protect first?
Commercial and comparison pages. They still earn clicks and they are the ones worth restructuring for extraction.
What should I stop relying on?
Definitional top-of-funnel content published purely for traffic. It is the first thing assistants absorb and the first traffic to vanish.
Is digital PR part of AEO?
It is an input. Digital PR earns the third-party corroboration that makes your claims credible to a model.
What is a prompt set?
A fixed list of the questions your buyers actually ask assistants, written in their words. It is the measurement baseline and it must stay fixed for movement to mean anything.
What is mention rate?
The share of tracked prompts where your brand is named at all. The bluntest measure and usually the first to move.
What is citation rate?
The share of tracked prompts where your brand is named and linked. Always lower than mention rate, and the number that correlates with referral traffic.
What is share of voice in this context?
Your mentions measured against a named competitor set on the same prompts, so a general rise in AI answer volume does not read as progress.
What is an AI crawler?
A bot that fetches pages on behalf of an AI system. Server logs are the only unarguable evidence that one reached a given page.
What is llms.txt?
A proposed file for declaring site content to AI systems. Adoption is limited and it is not a ranking factor; fix crawler rules first.
Should I block AI crawlers?
A business decision rather than a technical one. Blocking protects content from uncredited use and also guarantees you are not cited.
Do these terms mean anything different outside the US?
Not meaningfully. The vocabulary is inconsistent everywhere, and the same overlap applies.
Is there a standards body defining these terms?
No. That is the root of the problem and the reason this page exists.
How do I compare two proposals that use different terms?
Put the deliverable lists side by side and ignore the labels entirely. If the lists match, the proposals match.
What is the single most useful question to ask a provider?
‘What differs between this and the SEO work I already pay for?’ The quality of that answer tells you most of what you need to know.

Sources and further reading

  1. Google Search Essentials — SEO starter guide
  2. Google: creating helpful, reliable, people-first content
  3. Google: intro to structured data
  4. Google: LocalBusiness structured data
  5. Google: FAQPage structured data
  6. Google: Article structured data
  7. Google: Product structured data
  8. Google: title links in search results
  9. Google: control your snippets
  10. Google: robots.txt introduction
  11. Google: sitemaps overview
  12. Google: consolidate duplicate URLs
  13. Google: redirects and Search
  14. Google: JavaScript SEO basics
  15. Google: multi-regional and multilingual sites
  16. Google Search Central Blog
  17. Google: get started with Search Console
  18. Google: how local search results are determined
  19. Google Business Profile: prohibited and restricted content
  20. Google Business Profile: address and service area guidelines
  21. Google Business Profile: review policy
  22. Google Business Profile: add or edit categories
  23. Google Ads: location targeting settings
  24. Google Ads: about negative keywords
  25. Google Ads: about Quality Score
  26. Google Ads: importing offline conversions
  27. Google Ads: about Smart Bidding
  28. Google Ads: about Performance Max
  29. Google Local Services Ads: eligibility and screening
  30. Google Ads: keyword match types
  31. Google Analytics 4: about conversions
  32. Google Analytics 4: attribution models
  33. US Census Bureau QuickFacts: New Jersey
  34. US Census Bureau: American Community Survey
  35. US Census: Statistics of US Businesses
  36. Bureau of Labor Statistics: New Jersey data
  37. BLS: Occupational Employment and Wage Statistics
  38. NJ Department of Labor: labor market information
  39. New Jersey Business Action Center
  40. US Small Business Administration: New Jersey district
  41. USA.gov: business resources
  42. web.dev: Core Web Vitals explained
  43. web.dev: Largest Contentful Paint
  44. web.dev: Cumulative Layout Shift
  45. web.dev: Interaction to Next Paint
  46. Google PageSpeed Insights
  47. Google Rich Results Test
  48. Google Search Console
  49. W3C Markup Validation Service
  50. Schema.org: LocalBusiness type
  51. Schema.org: Service type
  52. Schema.org: FAQPage type
  53. Schema.org: HowTo type
  54. W3C: WCAG 2.2 quick reference
  55. FTC: CAN-SPAM Act compliance guide
  56. FCC: telemarketing and robocall rules (TCPA)
  57. FTC endorsement guides — reviews and testimonials
  58. FTC: rule on consumer reviews and testimonials
  59. HHS: HIPAA guidance on online tracking technologies
  60. New Jersey Courts: attorney advertising guidelines
  61. New Jersey DCA: construction codes and permits
  62. New Jersey Home Improvement Contractor registration
  63. New Jersey Division of Consumer Affairs
  64. TikTok for Business
  65. TikTok Creative Center
  66. TikTok Ads Help Center
  67. TikTok Community Guidelines
  68. TikTok Terms of Service
  69. TikTok Privacy Policy
  70. TikTok Safety Center
  71. TikTok Transparency Center
  72. TikTok Creator Portal
  73. TikTok Newsroom
  74. TikTok for Developers
  75. TikTok advertising solutions
  76. TikTok Creator Marketplace
  77. TikTok Business Center
  78. TikTok for Business blog
  79. TikTok Creative Center: top ads
  80. TikTok Branded Content policy
  81. TikTok Shop for sellers
  82. Instagram for Business
  83. Instagram for Creators
  84. Instagram Help Center
  85. About Instagram
  86. Meta Business Suite
  87. Meta Business Help Center
  88. Meta Transparency Center
  89. About Meta
  90. Meta: Instagram platform docs
  91. YouTube Creators
  92. YouTube Official Blog
  93. YouTube Shorts help
  94. How YouTube Works
  95. YouTube Studio
  96. LinkedIn Marketing Solutions
  97. LinkedIn Help
  98. Pinterest Business
  99. Pinterest Business Help
  100. Snapchat for Business
  101. X for Business
  102. Reddit communities
  103. Reddit for Business Help
  104. ASCAP
  105. BMI
  106. SESAC
  107. Global Music Rights
  108. PRS for Music (UK)
  109. PPL (UK)
  110. SOCAN (Canada)
  111. APRA AMCOS (Australia)
  112. GEMA (Germany)
  113. SACEM (France)
  114. SIAE (Italy)
  115. JASRAC (Japan)
  116. IFPI
  117. RIAA
  118. National Music Publishers Association
  119. Harry Fox Agency
  120. SoundExchange
  121. Music Reports
  122. Epidemic Sound
  123. Artlist
  124. Soundstripe
  125. PremiumBeat
  126. AudioJungle
  127. Free Music Archive
  128. Creative Commons
  129. Incompetech
  130. FTC: advertising and marketing
  131. FTC: disclosures 101
  132. FTC: endorsement guides
  133. FTC: consumer reviews rule
  134. FTC: advertising FAQs
  135. US Copyright Office
  136. US Copyright Office: DMCA
  137. US Copyright Office: music FAQ
  138. US Copyright Office: fair use FAQ
  139. USPTO: trademarks
  140. UK Advertising Standards Authority
  141. ACCC (Australia)
  142. Competition Bureau Canada
  143. GDPR overview
  144. California Consumer Privacy Act
  145. COPPA
  146. FTC: children’s privacy
  147. W3C Web Accessibility Initiative
  148. W3C: WCAG
  149. W3C: captions
  150. W3C: making audio and video accessible
  151. ADA.gov
  152. WebAIM
  153. Epilepsy Foundation
  154. Pew Research: internet and technology
  155. DataReportal
  156. US Census Bureau
  157. US Bureau of Labor Statistics
  158. Interactive Advertising Bureau
  159. Think with Google
  160. Google Trends
  161. Nielsen insights
  162. Schema.org: VideoObject
  163. Schema.org: SocialMediaPosting
  164. Schema.org: MusicRecording
  165. Schema.org: HowTo
  166. Schema.org: FAQPage
  167. Schema.org: Organization
  168. Google: video best practices
  169. Google: video structured data
  170. CapCut
  171. Adobe Premiere Rush
  172. DaVinci Resolve
  173. Canva
  174. Descript
  175. VEED
  176. Kapwing
  177. Otter.ai
  178. Later
  179. Buffer
  180. Hootsuite
  181. Sprout Social
  182. Google Analytics
  183. Google Search Console
  184. Google Analytics developer docs
  185. GA4: events and conversions
  186. Matomo
  187. Plausible Analytics
  188. Similarweb
  189. UK Information Commissioner’s Office
  190. Office of the Privacy Commissioner of Canada
  191. Australian OAIC
  192. European Data Protection Board
  193. EU data protection
  194. EU Digital Services Act
  195. Ofcom
  196. FCC
  197. AIGA
  198. Nielsen Norman Group
  199. Smashing Magazine
  200. web.dev
  201. MDN: web media
  202. MDN: the video element
  203. ISO 21001 (reference)
  204. Buma/Stemra (Netherlands)
  205. STIM (Sweden)
  206. Teosto (Finland)
  207. Koda (Denmark)
  208. TONO (Norway)
  209. IMRO (Ireland)
  210. SGAE (Spain)
  211. ZAiKS (Poland)
  212. KOMCA (South Korea)
  213. MCSC (China)
  214. CISAC
  215. World Intellectual Property Organization
  216. TikTok: creating videos
  217. TikTok: exploring videos
  218. TikTok: privacy settings
  219. TikTok: growing your audience
  220. TikTok Creator Academy
  221. TikTok Effect House
  222. TikTok for small business
  223. Instagram: Reels help
  224. YouTube: Shorts best practice
  225. How YouTube recommends
  226. Pinterest Predicts
  227. Snapchat for Business
  228. Hootsuite blog
  229. Social Media Examiner
  230. Marketing Week
  231. Adweek
  232. Google Search Essentials — SEO starter guide
  233. Google: creating helpful, reliable, people-first content
  234. Google: intro to structured data
  235. Google: LocalBusiness structured data
  236. Google: FAQPage structured data
  237. Google: Article structured data
  238. Google: Product structured data
  239. Google: title links in search results
  240. Google: control your snippets
  241. Google: robots.txt introduction
  242. Google: sitemaps overview
  243. Google: consolidate duplicate URLs
  244. Google: redirects and Search
  245. Google: JavaScript SEO basics
  246. Google: multi-regional and multilingual sites
  247. Google Search Central Blog
  248. Google: get started with Search Console
  249. Google: how local search results are determined
  250. Google Business Profile: prohibited and restricted content
  251. Google Business Profile: address and service area guidelines
  252. Google Business Profile: review policy
  253. Google Business Profile: add or edit categories
  254. web.dev: Core Web Vitals explained
  255. web.dev: Largest Contentful Paint
  256. web.dev: Cumulative Layout Shift
  257. web.dev: Interaction to Next Paint
  258. Google PageSpeed Insights
  259. Google Rich Results Test
  260. Google Search Console
  261. W3C Markup Validation Service
  262. Schema.org: LocalBusiness type
  263. Schema.org: Service type
  264. Schema.org: FAQPage type
  265. Schema.org: HowTo type
  266. W3C: WCAG 2.2 quick reference
  267. US Census Bureau QuickFacts: New Jersey
  268. US Census Bureau: American Community Survey
  269. US Census: Statistics of US Businesses
  270. Bureau of Labor Statistics: New Jersey data
  271. BLS: Occupational Employment and Wage Statistics
  272. NJ Department of Labor: labor market information
  273. New Jersey Business Action Center
  274. US Small Business Administration: New Jersey district
  275. USA.gov: business resources

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The fifth termAI SEO is the phrase most buyers actually type — roughly 8,100 US searches a month against 2,400 for answer engine optimization — and it means the same thing as the other four. It is the least precise label and the most used one, which is a common pattern for a discipline that is about two years old.

Where does 'AI SEO' fit alongside AEO, GEO and LLM SEO?

It is the buyer-facing name for the same work. AI SEO, answer engine optimization, generative engine optimization, LLM SEO and AI search optimization describe substantially identical deliverables under five labels that emerged from five different communities.

The labels are not arbitrary, though. Each one tells you where the speaker came from. Practitioners who started in SEO say AI SEO because it signals continuity with what their clients already buy. Agencies that wanted to name a new category say AEO. Vendor and academic writing says GEO. Technical teams say LLM SEO because the model and retrieval layer is what they actually work on. Enterprise and analyst writing says AI search optimization.

None of that affects the work. It affects only how hard it is to compare two proposals, which is why the useful move is to ignore the label entirely and compare deliverables.

Which term should you use?

Whichever your audience uses. If you are briefing an agency, use theirs. If you are writing for buyers, AI SEO is the phrase they search for. If you are writing for engineers, LLM SEO describes the actual mechanism more accurately.

AI SEO

~8,100/mo. The phrase buyers type. Broadest and vaguest — it also collects people looking for AI tools that do SEO work, which is a different intent entirely.

Generative engine optimization (GEO)

~4,400/mo. Emerged from vendor and academic writing. Emphasises the generative surface rather than the answer.

Answer engine optimization (AEO)

~2,400/mo. The most precise of the five, because the work is about being the answer rather than the link.

AI search optimization

~1,300/mo. Enterprise and analyst phrasing. Emphasises the search surface specifically.

LLM SEO

~880/mo. What technical teams call it. The most accurate description of the mechanism and the least used by buyers.

AI visibility

The outcome rather than the method. Used mostly by measurement vendors, which is why the tools category clusters around this phrase.

Does the ambiguity of 'AI SEO' cause real problems?

One, and it is worth knowing. The phrase collects two unrelated intents: people who want to be visible inside AI answers, and people who want AI tools that help them do SEO — prompts, content generators, automated audits.

That is why search results for AI SEO mix agency service pages with software listicles, and why a provider found under that term may be selling either. Ask which one they do before the second meeting.

The five terms, by usage and precision

TermUS searches/moWho uses itPrecision
AI SEO~8,100BuyersLow — collects two different intents
Generative engine optimization~4,400Vendors, academic writingMedium
Answer engine optimization~2,400Practitioners, agenciesHighest
AI search optimization~1,300Enterprise, analystsMedium
LLM SEO~880Technical teamsHigh on mechanism, low on adoption

Frequently asked questions

Is AI SEO the same as AEO?

Yes, in practice. AI SEO is the buyer-facing label; answer engine optimization is the more precise description of the same work.

Is AI SEO the same as GEO?

Yes. Generative engine optimization came out of vendor and academic writing; AI SEO is what buyers type. The deliverables overlap almost completely.

Which term is most searched?

AI SEO, at roughly 8,100 US searches a month, against about 4,400 for generative engine optimization and 2,400 for answer engine optimization.

Which term is most precise?

Answer engine optimization, because the work is about being the answer rather than being a link in a list.

Why does 'AI SEO' cause confusion?

It collects two unrelated intents: being visible inside AI answers, and using AI tools to do SEO work. Search results for the term mix both.

Should I choose an agency based on which term they use?

No. The label tells you which community they came from, not what they deliver. Compare deliverables instead.

Is there a sixth term coming?

Probably. The field is about two years old and the vocabulary has not settled. Whatever appears next will most likely describe the same six workstreams again.

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