ChatGPT now searches inside your site. Is your site ready to be searched?
In August, ChatGPT started running site: searches on specific domains, a 46-fold jump in one day. It changes what GEO work actually means.
Most GEO advice assumes the AI searches the web and picks a result. Since August, ChatGPT often picks a domain first and then searches inside it.
What query fan-out is
When you ask ChatGPT a question that needs fresh information, it doesn't run your exact words as one search. It writes several searches of its own, runs them, and builds the answer from the combined results. That is fan-out. Ahrefs found cited page titles matched these fan-out queries even more closely than they matched the user's prompt (similarity 0.656 against 0.602), which tells you the background searches matter as much as the question.
What changed on 8 August
Promptwatch's tracking showed the share of ChatGPT fan-out queries using the site: operator jumping from about 0.37% to 16.8% in a day, while the average number of searches per response rose from about 1.08 to 1.83. ChatGPT kept its general searches and added domain-scoped ones on top. The same week, Reddit's share of ChatGPT citations collapsed.
A domain-scoped search looks like site:zeevron.com android vitals threshold. The model has decided a domain is worth checking and wants the best page on it.
Why this matters
| Step | What decides it | Your lever |
|---|---|---|
| 1. Domain chosen | Brand recognition, mentions, earlier results | Be known for the topic: mentions, links, consistent expertise |
| 2. Page found | Index coverage, title and description match | One clear page per question, indexed, with a literal title |
| 3. Page cited | Clear answer near the top, relevance | Answer first, then detail |
Step 2 is new and mostly ignored. If ChatGPT searches your domain for "refund policy annual plan" and your answer sits in paragraph nine of a page titled "Billing", the scoped search may not surface it.
What to do
- One question, one page. Recurring questions about your product deserve their own URL with a title that states the question.
- Literal titles and descriptions. "How to cancel an annual plan" beats "Managing your subscription".
- Get indexed in both Google and Bing. We don't know which index serves ChatGPT's site: queries, and the honest answer is that it may vary (see does ChatGPT still use Bing). Submit sitemaps to both and use IndexNow for Bing.
- Let OAI-SearchBot in. Check robots.txt and your firewall with our AI crawler checker.
- Run the search yourself. Type
site:yourdomain.complus your ten most important questions into Google and Bing. If the right page isn't first, ChatGPT is unlikely to find it either.
This is one week of third-party data on a system that changes often. Treat the numbers as a signal, not a law, and recheck your own citations.
Questions people ask
What is query fan-out?
Query fan-out is when an AI search engine splits one user question into several background searches, runs them, and combines the results into a single answer.
Does ChatGPT use site: searches?
Yes, increasingly. Promptwatch measured the share of ChatGPT fan-out queries using site: rising from about 0.37% to 16.8% on 8 August 2026.
How do I make my site work with site: queries?
Give each important question its own indexed page with a literal title and description, and check that a site: search for that question returns the right page in Google and Bing.
Want this mapped onto your product?
See how our GEO work runs, or send your store link and a founder will reply personally.
