What is AEO?
Answer Engine Optimization, explained

AEO — Answer Engine Optimization — is the practice of making your website easy for AI assistants to find, read and cite. Where SEO works to rank your page on a results list, AEO works to make you the source ChatGPT, Claude, Gemini or Perplexity names when it answers a question directly. As more people get their answers from an assistant instead of a search results page, AEO is becoming the way you stay visible where the attention is moving.

Why “answer engines” changed the game

For two decades, being found online meant ranking on Google: you earned a position on a results page and a human clicked through to your site. Answer engines break that model. When someone asks ChatGPT “what's the best tool for X?” or Perplexity “how do I do Y?”, the assistant composes an answer— often naming a few sources — and the user reads it without visiting anyone's site. The link, and the click, may never happen.

That shifts the goal from ranking to being cited. If your category's questions are increasingly answered inside an assistant and you're not the source it draws on, you're invisible exactly where buying decisions are starting — even if you still rank #1 on Google. AEO is the discipline of closing that gap.

How AEO differs from SEO

AEO isn't a replacement for SEO — it's a layer on top that shares most of the same foundation. The short version: SEO optimizes for a ranking and a click; AEO optimizes for a citation in an answer. They diverge on which crawlers matter, how much JavaScript is tolerated, and how success is measured. We break the whole comparison down in AEO vs SEO: do you need both? (short answer: yes, and they're cheaper together than apart).

What AI assistants actually need from you

Getting cited comes down to three gates, in order — a page has to be reachable, then readable, then quotable. Miss the first and the rest never matter.

• Reachable.The AI crawlers have to be able to fetch your pages. The catch is that they're a different set of bots from Googlebot — GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended — and they're often blocked without anyone noticing, usually at the CDN or WAF rather than in robots.txt. Here's how to check whether you're blocking GPTBot.
• Readable. Once a bot fetches the page, your real content has to be in the raw HTML. AI crawlers generally don't run JavaScript, so content that only appears after the page hydrates reads as an empty shell. This is the JavaScript rendering problem — and it invisibly sinks a lot of otherwise well-built sites.
• Quotable. Even readable content has to be easy to lift as an answer: an answer-first lede, question-shaped headings, FAQ sections, and clear structured data. We cover exactly what the assistants reward in how to get cited by ChatGPT.

The building blocks of AEO

Put concretely, “doing AEO” means working on a handful of specific signals:

• AI crawler access.Allow the AI user-agents in robots.txt and make sure your CDN/WAF isn't challenging or blocking them.
• Server-rendered content.Ship your real text in the HTML via SSR, static generation or prerendering — don't depend on client-side JavaScript to paint it in.
• Structured data. schema.org JSON-LD — especially FAQPage and Organization — helps assistants understand what you are and lift clean answers.
• Answer-first content structure. Lead with the answer, use question-shaped headings, and keep claims self-contained so a single paragraph can stand alone as a citation.
• Entity clarity. Unambiguous signals about who you are — a consistent name, an Organization schema with sameAs links to your official profiles.
• An llms.txt map. A plain-text, curated index of your key pages for assistants. Here's what llms.txt is and whether you need one.

These map to the six areas an AEO audit looks at: AI Crawler Access, llms.txt, Structured Data, Content Structure, Technical Foundations and Agent Readiness.

How AEO is measured

Because there's no ranking to track, AEO success is measured in citations and mentionsrather than positions and clicks. The questions that matter: when someone asks an assistant about your category, does it name you? Is what it says accurate and current? Are you the source it links? That's a share-of-voice problem — how often and how favorably you show up in AI answers — not a click-through-rate one.

How to see where your site stands

You can spot-check the basics by hand. Request a page as an AI crawler to confirm it's reachable:

curl -A "GPTBot" -I https://yourdomain.com
# 200 OK -> reachable
# 403 / 401 / challenge -> blocked upstream

Then view the page source (not the inspector) to confirm your real content is in the HTML, and search it for application/ld+json to see whether your structured data is present server-side.

Or do all of it at once. AEOScan crawls your site the way the assistants do, runs 34 checks across the six areas above, and asks ChatGPT, Claude, Gemini and Perplexity what they actually know about you — printing their unedited answers next to the checks that explain the gaps, with copy-paste fixes. Free, about 30 seconds, no signup.

The bottom line

AEO is what SEO becomes when the destination is an answer instead of a results page. The job is the same at its core — be the clearest, most reachable, most readable source on a question — but the audience now includes AI assistants that read differently from search engines and reward being citable over being ranked. Get reachable, get readable, get quotable, and you stay visible both in how people find you today and how they'll find you next.

Frequently asked questions