What is answer engine optimisation?
Answer engine optimisation is search optimisation for systems that answer instead of listing. An answer engine reads your page, extracts the part that resolves the question, and presents it inside its own response, usually with a citation link back to you. AEO is the work that makes your page the part it extracts.
Definition
American sources spell it answer engine optimization. The discipline is identical either way, and both spellings describe the same set of techniques.
In marketing terms, AEO sits alongside your existing search work rather than replacing it. You still need pages that rank, because most answer engines retrieve from a search index before they generate anything. What changes is the shape of the page, the clarity of the brand behind it, and the way you measure the result. A page built for AEO leads with the answer, defines its terms, structures its evidence, and makes it straightforward for a machine to lift 40 words without losing the meaning.
The commercial argument is short. When a buyer asks ChatGPT which agency to shortlist, or asks Google a question your service page already answers, the brands named in that answer get considered. Everything else is invisible.
AEO vs SEO: what actually changes
The difference is the unit of success. Traditional SEO wins a position and earns a click. AEO wins a citation inside somebody else's answer, and the click is optional. That single change cascades through everything: what you write, how you structure it, who you compete against, and what you can measure.
| Dimension | Traditional SEO | AEO |
|---|---|---|
| Unit of success | A ranked position | A citation inside an answer |
| Where the result appears | A list of links | Inside generated text |
| What you optimise | Pages | Passages and entities |
| Query shape | Short keyword phrases | Full questions, conversational |
| Competitor set | The organic top ten | Anything in the retrieval pool |
| Primary measure | Positions, impressions, clicks | Appearances, mentions, referrals |
| Structured data role | Rich result eligibility | Disambiguation and attribution |
| Off-site role | Links | Links plus unlinked corroboration |
Traditional SEO is not obsolete here. Ranking is still the substrate, because Google AI Overviews draw on Google's index and ChatGPT's search mode draws on Bing's. If you are not indexed and reasonably visible, you are not in the retrieval pool that answers get built from. AEO is the layer on top: it decides whether a page that is already retrievable actually gets quoted.
The practical consequence is that AEO work is mostly editing, not publishing. Most sites already have the pages. What they lack is a direct answer in the opening 40 words, headings phrased as the questions people actually ask, a table where a table is warranted, and consistent facts about the organisation across every page that mentions it.
The measurement change is the one that catches teams out. There is no rank tracker for a sentence inside a generated answer, and impressions do not exist for a citation. You are counting appearances, mentions and referral sessions instead of positions.
