GEO vs SEO vs AEO: what is the difference?
Three labels, one foundation and two real differences. What each term means, where the work diverges, and which of them you should be buying separately.
SEO is getting a page ranked in a list of results. GEO is getting it quoted in an answer an assistant writes. AEO is an older name for roughly the same thing as GEO. The foundations are shared almost entirely; the two genuine differences are what you measure and which third-party pages matter.
For the full method rather than the definitions, generative engine optimization is the pillar this sits under.
What does each term actually mean?
Search engine optimization is the older discipline and the broadest: making a site that search engines can crawl, understand and rank, so a page appears in a list of results a person then chooses from.
Answer engine optimization arrived when search results started answering questions directly rather than only linking to answers. It was mostly about featured snippets and question-shaped content, and it is now used loosely as a synonym for the next one.
Generative engine optimization is the current term for being cited inside an answer that a model writes. The output is a sentence with your link attached rather than a ranked entry, and the competition is for a handful of source slots.
A fourth label, LLMO, appears occasionally and means the same again. The proliferation of names is a symptom of a young field rather than evidence of four disciplines, and the useful question when someone uses one is not which word they chose but which of the two real differences below they can actually explain.
| SEO | GEO / AEO | |
|---|---|---|
| Target | A position in a ranked list | A citation inside a written answer |
| Unit of work | The page | The passage |
| Measurement | Rankings, clicks, impressions | Mention rate and citation rate over time |
| Key third parties | Sites that link to you | Sites that describe you: reviews, listicles, profiles |
| Feedback speed | Slow but stable | Fast but noisy; a single answer means nothing |
Does ranking get you cited?
Not dependably, and this is the clearest evidence that the disciplines are not identical. In a study of 13,184 tracked citations, only a minority of the domains assistants cited also appeared in Google's top ten for the matching query — and at the level of exact URLs the overlap was very small for two of the four engines [1].
10% to 30%
Google's own AI features are the exception that proves the shared foundation. The company states that there are no additional requirements to appear in AI Overviews or AI Mode and no special optimisations necessary: a page must be indexed and eligible to be shown with a snippet, and that is all [2]. On Google's surfaces, GEO is SEO with better-shaped paragraphs.
So is GEO just SEO with a new name?
Mostly, and not entirely. Two parts are genuinely different, and they are the two that cost money.
The first is measurement. There is no position to check. You track how often you are named and how often you are linked, across a fixed set of questions and several engines, over weeks — because the same question asked twice returns different sources.
The second is the weight of third-party pages. In search, other sites help by linking to you. In assistant answers, other sites frequently are the answer: review platforms, comparison posts and professional profiles get cited in place of your own site, which makes claiming and correcting them the highest-return work in the discipline.
That difference also changes who does the work. Link building is an outreach job aimed at getting a link. This is closer to an accuracy job aimed at getting a description right — the profile, the category, the price band, the languages you work in — on pages you often already have and have not looked at in two years.
Which should you be buying?
Buy the foundation first, because all three sit on it: pages a crawler can reach, answers written to be lifted, and accurate profiles wherever your category is described. That work pays into rankings and citations at the same time, which is the strongest argument for not splitting the budget by acronym at all.
A practical sequence for most companies: confirm nothing at the edge is blocking assistant crawlers, rewrite the handful of commercial pages that already get traffic so each opens on a direct answer, and fix the third-party descriptions of your business. None of that is engine-specific and all of it is prerequisite.
Then add measurement, because without it you cannot tell whether anything you do next works. An AI visibility audit is a baseline rather than a fix, and it is the cheapest thing on this list.
Only then spend on anything engine-specific. If your buyers use one assistant in particular, getting cited by ChatGPT is the tactical version for the one that cites most sparingly and rewards primary sources most clearly. If Perplexity matters more to your buyers, how to get cited by Perplexity covers the same tactics adapted to how it actually picks sources.
Questions people also ask
Is AEO a different thing from GEO?
In practice they are used interchangeably. Answer engine optimization was the earlier term and leaned on featured snippets; generative engine optimization is the one the industry settled on for assistant answers. Treat a quote that bills them separately with suspicion.
Should GEO be a separate line on an agency invoice?
A named line, yes. A separate programme charged as though none of the underlying work overlaps with SEO, no. The measurement and the third-party work are genuinely new; rewriting your pages is not.
Does SEO still matter if assistants are answering questions?
Yes, and more than the label suggests. A page has to be crawlable, indexed and useful before any engine can quote it, and Google's AI features run on the ordinary index with the ordinary requirements.
Which should a small business do first?
The foundations, which are the same for all three: reachable pages, clear answers, accurate profiles. The engine-specific work is only worth doing once those exist.
Sources
- I tracked 13,184 AI citations across 4 LLMs: here's what I learned — Orbit Media Studios (checked 11 September 2026)
- AI features and your website — Google Search Central (checked 11 September 2026)
See where your site stands in assistant answers today
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Who wrote this
Ibrahem HelalCo-founder
Leads strategy and delivery.
Works on: SEO, GEO
Reviewed before publishing by Jeremy Zava, Co-founder.
- Generative engine optimization: the playbookHow answer engines pick what to cite, what a quotable page looks like, which crawlers to allow, how to measure it, and a 90-day plan built on evidence.
- How to get cited by ChatGPTChatGPT cites few sources and prefers primary ones. What that means for your pages, your crawler rules and the third-party profiles it reaches for instead.
- How to choose an SEO agency in 2026A buyer's guide to hiring an SEO agency: what the work is, what it should cost, which proposal lines matter, and the questions that separate two quotes.
- GEO for B2B CompaniesWhy B2B buying questions lean on comparison posts and vendor pages more than forums, and what a vendor should do about its own AI visibility.