GEO/AEO: two names, one discipline
Several acronyms describe the same thing, GEO/AEO chief among them: GEO (Generative Engine Optimization), named in 2023, AEO (Answer Engine Optimization), sometimes LLMO (Large Language Model Optimization). For Fast Growth Advisors, they are two names for one discipline: being the source an AI cites when it writes its answer. GEO has taken hold. What matters is not the acronym, but that the moment your buyer asks the engine, they land on you, because your message is clear and attributable.
The essentials
- •GEO/AEO: GEO (Generative Engine Optimization) and AEO (Answer Engine Optimization) name one discipline, being the source AI engines cite.
- •GEO has taken hold as the term; AEO and LLMO name the same thing.
- •Watch out: AEO also stands for Authorised Economic Operator (customs), unrelated. One more reason to say GEO.
- •Some draw a scope nuance, but with no stable taxonomy: the levers are the same.
- •What sets Fast Growth Advisors apart: first the message the engine can extract and trust, structure second.
The vocabulary
GEO, AEO, LLMO: what are we talking about?
GEO/AEO is the same shift under several names: engines no longer just rank pages, they write an answer and cite their sources. GEO and AEO name one discipline, being the source an AI cites. Fast Growth Advisors sums it up like this:
| Acronym | Full form | What it targets |
|---|---|---|
| SEO | Search Engine Optimization | Ranking in the list of results |
| GEO | Generative Engine Optimization | Being cited in the answer the AI writes |
| AEO | Answer Engine Optimization | The same goal: being the cited answer |
SEO remains the foundation. GEO and AEO name the AI layer, and for Fast Growth Advisors they are one and the same discipline. One detail that matters: AEO is also the acronym for Authorised Economic Operator, a customs status with no connection here. One more reason to keep GEO as the primary term.
The benefit
GEO/AEO: what’s it actually for?
An executive types into ChatGPT, "which tool for my problem?". The engine does not return ten links: it writes three lines and cites two or three sources. Being one of those sources is GEO/AEO. Not being there is disappearing at the exact moment the buyer decides.
That is where the benefit sits: the citation puts you in front of the buyer at the point of decision, before a shortlist even exists. Fast Growth Advisors treats this visibility as a commercial issue, not a score, as part of its AI visibility offer. In concrete terms, a B2B startup cited in the answer wins meetings it would never have earned on page two of Google.
The dividing line
What makes a page citable?
Two pages describe the same product. One says "the next-generation collaborative platform". The other, "the software that replaces Excel for scheduling teams of more than 50 people". The engine cites the second: it knows which question it answers. The first, it has no idea where to place.
Citability does not reward the best-marked-up page, but the one whose claim the engine grasps fastest. That is what sets Fast Growth Advisors apart: where others optimise the extraction of a sentence the market does not understand, we fix the sentence first, then the structure. The lesson fits on one line: make your promise extractable, and the engine does the rest. See also GEO vs SEO for what separates ranking from citation.
The nuance
Should you separate GEO and AEO?
Some propose a scope nuance: AEO would cover citation in extractive answers (AI Overviews, snippets, voice), GEO the recommendation inside generative prose. The distinction is defensible, but it is not settled: there is no common taxonomy, and the levers are the same on both sides. Fast Growth Advisors therefore treats them as one discipline, without turning it into dogma. What decides is not the acronym you pick, it is the extractable clarity of your message. In plain terms, do not spend your energy arbitrating between two acronyms: spend it framing a claim the engine can isolate, attribute and cite. That is where visibility is won, whatever name you give it.
The engines
How do engines handle the same question?
One discipline, yes, but engines that do not handle the request the same way. Some query the web on every question, others answer mostly from memory; some fan the query out into several sub-queries, others fire only a few; and depending on the topic, the query may even be translated before it is sent. Across the same set of 20 prompts, the decision to search alone ranges from 30% to 100% depending on the engine.
| Engine | Queries the web | Queries fired | Query language | Index queried |
|---|---|---|---|---|
| Perplexity | Every time (100%) | Not exposed | Not measured | Its own |
| Claude | Often (85%) | 35 | French | Brave |
| Gemini | Sometimes (35%) | 15 | French | |
| ChatGPT | Rarely (30%) | 18 | English (tech topic) | Bing |
One measured example says it best. Given a French prompt asking which tools to compare for tracking a brand’s visibility on ChatGPT, Gemini and Perplexity, ChatGPT did not search that sentence: it fired an English query, "monitor brand mentions on ChatGPT tools". Claude kept French, "outils suivi visibilité marque ChatGPT Gemini Perplexity". Same intent, two queries, two languages.
So the keyword that matters is not the one your client types, it is the one the engine rewrites in its place. That is why Fast Growth Advisors starts from a clear, attributable message that survives rewriting and translation, before touching a single tag. Read these as trends, not rankings: it is a first pass, and language depends heavily on the sector.
Our measurement
What does Fast Growth Advisors measure on its own visibility?
Being cited stays rare, including for us. Across the twelve market questions Fast Growth Advisors tracks, Google cites the firm on only two: 12 citations out of 73 readings. We publish that figure because it shows the true size of the gap, and therefore the opportunity for whoever moves early. Our Message-Market Fit Observatory audited a sample of 369 French post-funding B2B startups, and confirms the cause: readiness to be cited by AI engines ranks last among the criteria audited. Neither GEO nor AEO makes up for a message the market does not understand. That is why Fast Growth Advisors always starts with the message, then makes it extractable.
Our audit
What does our GEO audit actually measure?
A page invisible to an AI can be invisible for three distinct reasons, each fixed somewhere else: the crawler never gets the page, the text is not in the bytes returned, or the extractor throws away text it did receive. Most audits stop at the first layer. Fast Growth Advisors measures all three, plus what your servers actually see.
| What we measure | What it reveals |
|---|---|
| Real crawler access | Request sent from outside, with the target agent and no consent cookie. A test run from your own server bypasses the firewall and validates access that does not exist. |
| Text without JavaScript | Most AI crawlers do not execute JavaScript. Anything injected on load does not exist for them. |
| What the extractor keeps | Measured on three real extractors, not on the source code. The layer almost nobody looks at, and often the costliest. |
| Whether your proof survives | Pricing, client logos, reviews, comparison tables and key figures are counted separately. That is where the losses concentrate. |
| Text carried by images | In a recent audit, seven client names out of eight existed only inside image attributes: invisible, and replaced in the engine’s reading by former employers. |
| Crawler hits in your logs | Which bots actually come to read, identity verified rather than merely declared, and how many land on errors. |
The output is not a score out of a hundred, it is a location: which sentence is lost, at which layer, and which fix brings it back. Most often the engine can say what the company does, but not what sets it apart, because the proof sits in a carousel or an image. So it describes the category and cites, as the reference for that category, the competitor who put its proof in text.
Sources
What are these findings based on?
- Google, introducing AI Mode and the query fan-out technique, May 2025. blog.google
- Vercel and MERJ (an audience measurement firm), "The rise of the AI crawler", December 2024, on JavaScript execution by AI crawlers. vercel.com
- Fast Growth Advisors measurements, August 2026: 20 prompts across four engines, plus tracking of twelve market questions.
FAQ
Frequently asked questions
GEO and AEO, are they the same thing?
In practice, yes. GEO (Generative Engine Optimization) and AEO (Answer Engine Optimization) name the same discipline: being the source an AI cites in its answer, rather than one link among ten. GEO has taken hold in common usage, probably because it was named first. Some draw a scope nuance, but there is no stable taxonomy yet: at Fast Growth Advisors, we treat them as one and the same discipline.
Doesn’t AEO mean something else?
It does, and that is a trap. AEO also stands for Authorised Economic Operator, a customs status with no connection to AI visibility. That is one more reason to use GEO as the primary term. What matters is not the acronym but the outcome: being the answer the engine gives your buyer.
Where should you start to get cited?
With the message. A clear, attributable sentence gets cited more often than a vague phrase, even a perfectly marked-up one. Technical structure comes next. It is also the most profitable order: a message your prospects understand lifts your conversion long before any AI-visibility gain.
GEO or AEO, what matters is being the answer.
Fast Growth Advisors tests the clarity of your message and its citability by AI engines for free, then tells you what to fix first.