The small group of sources an AI engine actually reads before writing a given answer.
ID
SS-DF-151
Confidence
Established · 76
Evidence
Emerging
Updated
2026-07-31
Definition
The small group of sources an AI engine actually reads before writing a given answer.
The retrieved set is the handful of documents, typically somewhere between three and fifteen URLs, that a generative engine pulls in response to a query and uses to compose its answer. It is the true competitive arena in AI search: a brand absent from the retrieved set cannot be recommended, regardless of how well its own website is optimised, because the model can only work from what it read. The composition of the set varies by engine, phrasing and run, which is why it must be sampled repeatedly rather than checked once.