Short answer
AEO, or answer engine optimization, is the practice of writing and structuring your pages so that search engines, voice assistants and AI tools can lift a direct answer from them and show it to the person who asked. It started with featured snippets and voice search and now includes AI answers. AEO builds on SEO, and the term is newer and looser than SEO.
What does AEO mean in plain words?
An answer engine is any system that gives a person an answer instead of a list of links. Google's featured snippets and “People also ask” boxes are answer engines. So are voice assistants such as Siri, Alexa and Google Assistant, and AI tools such as ChatGPT, Perplexity and Google's AI Overviews. AEO is the work of making your page the source of that answer.
Picture someone asking how to reset a Wi-Fi router. A search engine could show ten pages. An answer engine reads a few of them, picks the clearest steps, and shows those at the top, usually with a link to where they came from. AEO is the habit of writing the page that gets picked.
Is AEO a real field or just a new label?
A bit of both. The core ideas are old: answer the question directly, use a clear heading and back the answer with facts. People did this for featured snippets and voice search long before ChatGPT existed. What is new is that the label is now stretched to cover AI answers too, and a lot of marketing has attached itself to it.
Be careful with big claims. AEO and GEO (see what GEO means) overlap, and different agencies define them differently. Google's May 2026 guide to generative AI features says AI Overviews and AI Mode run on its core ranking systems, that the usual SEO fundamentals apply, and that no special markup, llms.txt file or rewriting into small chunks is needed. So treat AEO as a useful name for good habits, not as a separate algorithm you have to game.
How do you do AEO on a page?
- Find the real questions. Use Google's suggestions and “People also ask”, your sales emails, chat logs and reviews, and write them the way customers say them.
- Put one question in a heading and make it specific. “How long does a boiler service take?” works better than “Boiler services”.
- Answer in the first one or two sentences, then add detail below. There is no official length, but a direct answer of about 40 to 60 words reads well and suits a snippet.
- Be specific. Add the number, date, price range, place or step that makes the answer usable, and say where the fact comes from.
- Keep the page easy for machines to read: text in the page itself rather than loaded by scripts, a normal heading structure, and nothing that blocks crawlers.
- Keep it current. Update the page when facts change and show the date.
What does AEO not do?
- It does not promise you will be the answer. Engines choose among many pages, and the same question can get different answers on different days.
- It does not replace SEO. A page that cannot be crawled or indexed has no chance of being chosen, and Ahrefs found that about 76% of pages cited in Google's AI Overviews ranked in Google's top ten.
- It does not need an llms.txt file. Google says it does not use llms.txt for Search, and Ahrefs found that 97% of the files it studied received zero requests in May 2026. See whether llms.txt works.
- It does not run on schema markup as a trick. Structured data helps machines understand a page, but an Ahrefs study of 1,885 pages found no meaningful lift in AI citations after JSON-LD was added.
- It does not mean filling a page with question headings. A heading with no real answer under it helps nobody.
How is AEO different from SEO and GEO?
SEO is the broad job of being found and chosen in search results. AEO narrows that to being the direct answer: snippets, voice replies and AI summaries. GEO, generative engine optimization, narrows it to being cited or mentioned in answers that generative AI writes. One well-built page can serve all three. The side-by-side table in AEO vs GEO vs SEO shows where they differ in practice.
What should you do next?
- Pick your ten most important pages and write down the customer question each one should answer.
- Check that each page opens with a direct answer and that its text is visible without scripts.
- Make sure Google can index the page and that your robots.txt does not turn crawlers away.
- Read how to win featured snippets for the snippet side of the work.
Arcline checks several of these for you. Its “Ready for AI answers” score looks at question headings, a direct answer at the start of a page and text that is available without scripts, and the to-do list says what to fix. See Features. It cannot promise that any engine will pick your page.