What is answer engine optimization (AEO)?

Why AEO exists

Buyers now put questions to assistants and read one synthesized answer instead of scanning ten links. When that answer names a handful of businesses, being one of them is the new first page.

This changes what a good result looks like. A page one ranking still sends visitors. An assistant answer may send none, yet it can still shape which business the buyer calls. That is why AEO measures whether you are named, not only whether you are clicked.

Search engines still matter. Many assistants retrieve pages before writing an answer, so your pages have to be findable, and worth quoting once found.

What an answer engine does

Behind the scenes the process usually looks like this. Details differ by assistant and change often, and providers publish only part of it.

• It reads the question and often breaks it into sub-questions, a step called query fan-out.
• It retrieves candidate pages and the passages that answer each part, a method called retrieval-augmented generation.
• It writes an answer, sometimes with citations to the sources it used.
• It may name businesses it judges to be a good fit for the question.

What Google itself says

Google’s documentation on AI features says a page must be indexed and eligible to appear in Search with a snippet to be shown as a supporting link in AI Overviews or AI Mode. It adds that there are no additional technical requirements and no special schema.org markup to add (Google Search Central, last updated December 2025).

Google’s generative AI optimization guide goes further (last updated July 2026). It says AEO and GEO are, from Google’s perspective, optimizing for the search experience, which it considers SEO, and it names tactics you do not need: an llms.txt file, splitting content into small chunks, rewriting content in a special style for AI, or hunting for artificial mentions.

Read that as a floor, not a ceiling. Google describes how its own product works. Other assistants have their own crawlers and sources, and the questions buyers ask there are still worth answering well. See AI Overviews and AI Mode for Google’s side in detail.

What the research shows, and does not

The paper that popularized the term GEO (Aggarwal and colleagues, accepted to KDD 2024) tested nine ways of rewriting web content against a benchmark of queries. Its authors report that the best methods raised visibility in generative answers by up to 40 percent, and that adding quotations, statistics and cited sources worked best. Keyword stuffing scored below the unoptimized baseline.

Treat this carefully. The main experiments used one language model as the engine, with a second engine, Perplexity, tested on a smaller sample. The authors say results vary by topic and that they did not measure effects on search rankings. It shows which kinds of edits help in a lab setting. It is not a promise about your site.

The practical lesson matches ordinary good writing: specific facts, named sources and clear statements are easier for a system to use than vague claims.

What AEO is not

• A trick to rank inside a chatbot.
• A replacement for SEO. It extends it.
• Stuffing keywords into FAQs.
• A guarantee of being named.
• A reason to publish pages that exist only for machines.
• A file or format trick. See llms.txt for what such files can and cannot do.

Where to start, step by step

Start with the commercial questions buyers ask right before they hire or buy, because that is where being named pays. Write down 10 to 20 of them in the buyer’s own words. Then check what you currently get: ask each question in the main assistants and note who is named.

Next, check whether your site answers each question clearly, in the first paragraph of a page built for it. Fix gaps in that order: positioning, the missing pages, the crawl and technical basics, then proof such as reviews, named authors and sources. Our method follows six steps, shown in the Answer Method, and the measurement step tells you whether it is working.

Make sure AI crawlers can reach your pages, and that your business is described the same way everywhere, which is the subject of brand, entity and mentions.

What is changing

Assistants add features quickly. Google’s optimization guide, for example, now points site owners to a Generative AI performance report in Search Console. Expect better measurement over time and expect advice to change with it.

Be wary of anyone selling a fixed formula. The reliable approach is the unglamorous one: be the clearest, best-evidenced answer to a real question, make it easy to reach, and measure over months rather than days.