11/04/2026
A person asks ChatGPT one question. The answer may depend on several smaller searches behind the scenes: one for an official product page, another for pricing, and another for reviews or comparisons. That process, often called query fan-out, is a useful new lens for LLM SEO.
For practitioners, the takeaway isn’t simply “write more content.” It’s to understand the distinct questions an AI assistant may need to answer, make your brand’s most reliable information easy to retrieve, and check whether your visibility changes across platforms and over time.
What query fan-out means for LLM SEO
In an October 2026 study, Ahrefs analyzed 66.6 million free, logged-out ChatGPT responses from August and September, along with about 15 million fan-out queries. Its findings add important nuance to the idea that every prompt triggers a bundle of searches:
- 14.4% of the responses triggered a web search.
- When ChatGPT searched, it generated about 1.6 fan-out queries per response on average.