Two acronyms have arrived at once & they are routinely used as if they mean the same thing. They do not. Understanding the difference matters, because the work each one requires is different.
The short version
Answer Engine Optimisation (AEO) is about being the source that gets used when a search engine answers a question directly on the results page, without the user needing to click. Think featured snippets, People Also Ask, & Google's AI Overviews.
Generative Engine Optimisation (GEO) is about being retrieved & cited by a generative model when someone asks it a question. Think ChatGPT, Claude, Perplexity, Copilot & Gemini, where the answer is composed rather than listed.
The overlap is real, but the mechanisms differ. AEO is still fundamentally a ranking problem: you have to be in the considered set for the query. GEO is a retrieval & citation problem: your content has to be findable, parseable, quotable & corroborated well enough that a model reaches for it.
Why this changed the economics of search
For twenty years the deal was straightforward. You ranked, the user clicked, you got a visit. Answer engines break that deal. The user gets the answer & often does not click at all.
This is uncomfortable, & the panic reaction is to conclude that search is finished. It is not. What has changed is that visibility & traffic have come apart. You can be highly visible, quoted by name in an AI answer that thousands of people read, & see almost none of it in your analytics.
That has two consequences. Measurement has to change, because sessions no longer capture your reach. & the value of being the cited authority goes up, because a brand named inside an answer carries more weight than a blue link in position four.
What AEO actually requires
Answer engines extract. They need a clean, self contained passage that resolves the question without surrounding context.
- Answer immediately, then explain. Put the direct answer in the first forty to sixty words under the heading. Extraction systems take the passage that stands alone.
- Use the question as the heading. Phrase headings the way people phrase queries, not the way your internal team phrases them.
- Keep facts atomic. One claim per sentence. A passage carrying four dependent clauses is hard to lift cleanly.
- Mark it up. FAQ, HowTo, Product & Organisation structured data give the engine an unambiguous reading of what your page contains.
- Keep it current. Answer engines are noticeably reluctant to surface content that looks stale on time sensitive subjects.
What GEO actually requires
Generative engines do something different. They retrieve candidate sources, then synthesise. Getting retrieved & getting cited are two separate hurdles.
- Be corroborated. Models favour claims that appear consistently across independent sources. A fact stated only on your own site is weak evidence. The same fact reported by a trade publication is strong evidence. This is why digital PR now feeds AI visibility directly.
- Be attributable. Original data, named authors with real credentials, clear publication dates & a visible organisation behind the content all raise the odds of being quoted rather than absorbed anonymously.
- Be machine readable. Content locked inside images, heavy client side rendering or gated forms is content a retrieval system cannot use.
- Be unambiguous about identity. Consistent naming, a clear entity description & matching details across your site, your Google Business Profile & third party listings help a model connect the mentions into one entity.
- Be specific. Generic content is exactly what a model can already generate. It reaches for sources that contain something it cannot produce on its own: numbers, methods, first hand experience.
How to measure it when there is no click
Sessions will understate your reach, so add measures that do not depend on a visit.
Track branded search volume, because people who encounter you inside an answer often search your name afterwards. Track direct traffic to specific landing pages. Periodically query the major assistants with your core commercial questions & record whether you appear & how you are described. Watch referral traffic from AI tools, which is small but growing & tells you which pages get cited. & ask new enquiries how they found you, because self reported attribution catches what analytics now misses.
What to do now
Do not rebuild your strategy around this. The foundations are unchanged: a technically sound site, genuine expertise, corroborated authority & a page that converts. AEO & GEO reward those things more sharply than classic SEO did, they do not replace them.
The practical move is to take your ten most commercially important questions, answer each one directly & cleanly in a single passage, support the claims with evidence a third party has repeated, & make sure a machine can read all of it. That work serves classic rankings, answer engines & generative engines at the same time.