Answer engine optimization (AEO): where it came from, and what it asks of a page now

Where AEO came from: the one passage above the results

The first answer engines answered with somebody else's sentence. A featured snippet put one passage from one page above the ordinary results, which is why people called it position zero, and a voice assistant read one answer aloud and stopped. The prize was being that passage, and the craft that grew up around it was the craft of writing one: the question as a heading, the answer in the first sentence under it, a list or a table where the answer was a list or a table.

No markup ever requested the box. Google's documentation on featured snippets says its systems decide whether a page would serve a query well in that spot, and the only controls it gives a site are ways to decline. That set the terms of the practice from the start: an engine chooses, and a page makes itself easy to choose.

What changed when the answers started being written

A written answer is assembled rather than lifted. It can draw on several pages for one reply, name businesses without quoting any of them word for word, and cite its sources beside the text. Google's page on AI features says AI Overviews and AI Mode may use what it calls query fan-out, running several related searches across subtopics to build one response, and that they show a wider set of supporting links than a classic results page.

So the unit being competed for changed. It used to be a passage; now it is a fact about you that the answer can repeat and attribute: the service, the place, the price range, the reason to choose you. A page can supply that fact without being quoted at all, and a page that is quoted can still leave the business unnamed if the passage never says whose it is. That is the property this site's glossary calls citability: a passage that stays true, and stays yours, when it is lifted on its own.

What carried over unchanged

• The answer block. A question in the buyer's words as the heading, the answer in the first sentence under it, the conditions after. Writing to be cited shows the shape.
• Text in the HTML. A passage has to be in the page the server sends, not drawn by a script, kept in a PDF or set in an image.
• One fact in one place. A price or an address stated once, and linked from elsewhere, is a fact that cannot disagree with itself.
• Eligibility for a snippet. Google says a page has to be indexed and eligible to be shown with a snippet to appear as a supporting link in its AI features, with no extra technical requirement beyond that.
• Dates. A dated page tells any reader, and any engine, when its facts were last true.

The evidence for the core idea comes from outside Google. Aggarwal et al. (KDD 2024), the paper that named generative engine optimization, found on its benchmark that adding citations, quotations and statistics to a source raised its visibility in generated answers by up to about 40%, while keyword stuffing did not help. The findings reward the same specific, attributable writing that won featured snippets.

The snippet controls, which now reach AI answers too

The controls that once kept a page out of featured snippets now also limit what Google's AI features show. Google's AI features page names four of them. Use them on purpose, because each one that keeps text out of an answer also keeps it from being the answer.

These are Google's controls. The other assistants fetch through their own crawlers, which robots.txt addresses one token at a time; robots.txt for AI crawlers sets them out, and AI search engines at a glance lists who fetches for which assistant.

What AEO does not need

• A special file or special markup. Google's AI features page says none is required for AI Overviews or AI Mode.
• FAQ markup for its own sake. The FAQ rich result, cut back to government and health sites by the August 2023 change, has not appeared in Google Search since May 7, 2026, as Google's changelog records. The markup still labels question-and-answer pairs; the visible question and answer are what do the work.
• Speakable markup. The speakable property is in beta and meant for news content read aloud, not for a business's service pages.
• Separate content for AI. Google's guide to generative AI search says nothing needs rewriting just for AI systems, and it treats separate pages for every variation of a query, made to manipulate answers, as scaled content abuse. A second version of a page is also a second version of every fact on it.
• A new discipline. The work is the same whether it is called AEO or GEO, and it sits on the same pages that SEO already maintains.

AEO, GEO and SEO: one set of pages

This site uses GEO as its working term and files AEO as the synonym, as the glossary entry explains. What generative engine optimization is covers the term's origin in the paper and the work it describes, and GEO vs SEO sets the two side by side. The practical point is smaller than the naming debate: the pages that rank in a search engine are the pages an answer engine reads, and a page written to answer one question clearly serves both.

Where the two part company is measurement. A ranking is a position you can look up; an answer is a sentence that differs by run and by assistant. So AEO and GEO are measured by asking the questions, the same way every time, and counting who is named, as our methodology does.