ChatGPT now has over 900 million weekly active users. When someone asks it a question, it pulls from web sources to generate answers — and it can cite your website. But only if your site is structured for it. Here's exactly how to make that happen.
How ChatGPT Finds and Cites Websites
ChatGPT uses web crawlers called GPTBot (for indexing) and OAI-SearchBot (for search) to access web content. When a user asks a question, ChatGPT searches the web, reads the top results, and synthesizes an answer with citations linking back to the sources.
To get cited, your content needs to pass three tests: GPTBot must be able to access it, the content must be clearly structured, and it must directly answer the kind of questions users are asking.
Step 1: Allow GPTBot in Your robots.txt
This is the single most important step. If GPTBot is blocked in your robots.txt, ChatGPT literally cannot read your site. Check your robots.txt right now.
# Allow AI crawlers
User-agent: GPTBot
Allow: /
User-agent: OAI-SearchBot
Allow: /
User-agent: ChatGPT-User
Allow: /
# Also allow other AI bots
User-agent: ClaudeBot
Allow: /
User-agent: PerplexityBot
Allow: /
User-agent: Google-Extended
Allow: /Example robots.txt allowing major AI crawlers
Many CMS platforms and security plugins block AI crawlers by default. Check your robots.txt even if you didn't manually configure it.
Step 2: Write Quotable Answer Blocks
ChatGPT looks for concise, self-contained paragraphs that directly answer a question. The ideal format is a 40-60 word block right after a heading that poses or implies a question.
<h2>What is Answer Engine Optimization?</h2>
<p>Answer Engine Optimization (AEO) is the practice of
structuring website content so AI-powered search engines
like ChatGPT and Perplexity can extract, understand, and
cite it in their responses. AEO uses structured data,
semantic HTML, and AI crawler access to improve
visibility.</p>A well-structured answer block that ChatGPT can easily extract
Step 3: Add FAQ Schema
FAQPage JSON-LD makes your Q&A content machine-readable. ChatGPT can parse structured data directly, making it much easier to extract specific answers from your page. Add at least 3 question-answer pairs per page.
{
"@context": "https://schema.org",
"@type": "FAQPage",
"mainEntity": [
{
"@type": "Question",
"name": "How do I optimize for ChatGPT?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Allow GPTBot in robots.txt, add FAQ schema, write 40-60 word answer blocks, and use semantic HTML."
}
}
]
}FAQPage JSON-LD schema example
Step 4: Use Semantic HTML
Wrap your content in semantic tags: <article> for the main content, <section> for logical groups, proper heading hierarchy (H1 → H2 → H3), and <main> for the primary page content. This helps ChatGPT understand your page structure without guessing.
Step 5: Create an llms.txt File
The llms.txt convention is like a robots.txt for AI models. It tells AI engines what your site covers, which pages are most important, and how to cite you. Place it at your site root (e.g., yoursite.com/llms.txt).
Step 6: Target Question-Based Content
ChatGPT users ask questions. Your content should answer them. Structure pages around specific questions your audience asks. Use the question as a heading and the answer immediately after it. Think "How do I...", "What is...", "Why does..." — the formats that map directly to ChatGPT prompts.
How to Check If It's Working
Run a free AEO scan to check your site's readiness across all 6 factors. The scan checks GPTBot access, answer block formatting, schema markup, semantic HTML, llms.txt, and more — giving you a clear score and specific fixes.
Check your AEO score for free
Enter your URL and see how your site scores across all 6 AEO factors. No signup required.