AEO vs SEO: what is the same and what changes for AI answers
AEO, answer engine optimization, is about getting your page read and cited by AI answers such as ChatGPT, Perplexity, Claude and Google's AI features. It builds on SEO: crawlable, indexable, useful pages. The differences are more crawlers to let in, content that answers in the first lines, clear publisher and author data, and visible freshness.
AEO is sometimes sold as a replacement for SEO. It is better seen as SEO with a few extra requirements, because AI answers are built from pages that crawlers could fetch and understand. Google says as much for its own AI features: the same SEO fundamentals apply. The extra requirements come from the other assistants, which run their own crawlers and quote pages differently from a list of blue links.
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What does AEO have in common with SEO?
Almost all of the foundation. A page that cannot be crawled, is not indexed, or does not answer the question well will not do well in either. Google states that to appear as a link in AI Overviews or AI Mode a page must be indexed and eligible to be shown with a snippet, and that there are no additional requirements or special optimizations.
Good titles, a logical heading structure, a sitemap, internal links, fast pages, accurate structured data and content written by people who know the subject all carry over unchanged.
What is different about access for AI answers?
In classic SEO you mostly care about Googlebot and bingbot. AI answers add a set of crawlers from other vendors, each with its own robots.txt token and its own treatment by your firewall: OAI-SearchBot and ChatGPT-User for ChatGPT, Claude-SearchBot and Claude-User for Claude, PerplexityBot and Perplexity-User for Perplexity, plus Applebot for Apple.
Many of these vendors also run separate training crawlers. Blocking those is a policy choice and does not remove you from their answers, but a firewall rule that blocks "AI bots" as a group often catches the search crawlers too. A frequent AEO problem is not content at all; it is a 403 or a challenge page that only crawlers see.
Why does answer-first content matter more?
An AI answer quotes or paraphrases a passage, not a whole page. A passage that answers the question by itself, in the first lines under the heading, is easier to lift accurately than an answer spread over five paragraphs of introduction.
In practice: put a 40 to 60 word answer directly under the H1, phrase section headings the way people ask questions, keep each section self-contained, and link to primary sources such as standards and official documentation. None of this is new to good writing, but AI answers reward it more directly.
How do entities and structured data fit in?
An answer engine needs to know who is speaking. Mark up the publisher as an Organization with name, url, logo and sameAs links to its official profiles, and mark up articles with author, datePublished and dateModified. Keep the markup consistent with what the page shows; Google's guidelines say not to mark up information that is not visible to users.
Google also says no special schema.org markup is needed for its AI features, so treat structured data as a way to make facts unambiguous, not as a switch that turns citations on.
Does freshness matter for AI answers?
Questions about prices, policies, versions and laws have answers that change. A page that states when it was last updated, and does so consistently, gives an answer engine a reason to trust it for current questions. Use the same date in the visible page, in dateModified and in the sitemap lastmod, and change it only when the content really changes.
What is a practical AEO checklist?
- robots.txt allows the AI search crawlers you want to be cited by, and the file answers with status 200 or 404, never 5xx or HTML.
- Your firewall or CDN gives those crawlers the same page as a browser: no 403, 429 or challenge page.
- The main content is in the initial HTML, not added later by JavaScript.
- A 40 to 60 word answer sits right under the H1.
- Most H2 headings are phrased as questions people ask.
- The page links to primary sources.
- JSON-LD names the publisher, author and dates, and matches the visible page.
- dateModified and sitemap lastmod agree, and the page is listed in the sitemap.
- hreflang links are reciprocal if the page exists in several languages.
AISeeWhy checks each item on this list for a single URL, gives every finding a priority and computes a score from 100, minus 15 for each P1, 6 for each P2 and 2 for each P3 finding.
Frequently asked questions
Is AEO the same as GEO?
The terms overlap. Both describe optimizing for AI-generated answers rather than a list of links. Some people use GEO, generative engine optimization, for the same work.
Will AEO replace SEO?
No. Google's AI features rely on its Search index and the same requirements, and other AI answers also need pages that can be crawled and understood. AEO adds to SEO.
Can I measure AEO results?
Partly. You can verify access, content structure and markup directly. Whether a given assistant cites you for a given question depends on the question and changes over time, so treat citation checks as samples, not rankings.
Do I need special AI files like llms.txt for AEO?
Not for Google, which says no AI text files are needed. llms.txt is an optional proposal that some tools read; it does not fix access or content issues.
Sources
- Google Search Central: AI features and your website
- Google Search Central: Introduction to structured data
- Google Search Central: JavaScript SEO basics
- OpenAI: Overview of OpenAI crawlers
- Anthropic: Does Anthropic crawl data from the web, and how can site owners block the crawler?