How do AI engines choose their sources?
What happens between a buyer’s question and the answer, and which parts of it you can influence.
How do AI engines choose their sources?
A search-enabled AI engine turns one question into several web searches, reads the pages those searches return, and cites the few that best answer each part of the question. Pages get chosen when they can be crawled, answer the sub-question directly with specific facts, and come from sources the engine already finds credible.
Last reviewed
What is query fan-out?
Query fan-out is the step where the engine splits a question into several narrower searches. “What’s the best 2-person tent under $400 that will hold up in the rain?” might become searches for the best tents under $400, rain performance reviews, and a head-to-head comparison. Each search brings back its own pages. Google has described this step for AI Mode, and other search-enabled engines show the searches they ran.
Which pages tend to get cited?
- Pages crawlers can read. If robots.txt or a CDN blocks the engine’s search crawler, the page cannot be read at search time.
- Pages that answer the sub-question directly. The answer is in the first lines, in text, with specific facts.
- First-hand and specific sources. Reviews with tests, forums with owner experience, and videos that show the product.
- Recent pages. Citations fade as pages age. Citation decay measures how fast.
What can a brand change?
Your own pages: crawl access, answer-first structure and the facts on them. And your coverage: getting accurate, specific mentions on the review sites, forums and channels engines cite for your category. Lighthouse shows those sources by engine and prompt. Citation tracking in Lighthouse.
Where should you go next?
Questions people ask
Do AI engines cite the top Google result?
Often, but not always. Engines read several results for several searches, so a page ranking lower for one sub-question can still be cited.
Why do AI engines cite Reddit so often?
Forums carry first-hand, specific experience that brand pages leave out. Why AI engines cite Reddit covers the pattern.
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