AI search adds a writing layer to search.
A traditional search page mainly returns ranked links. An AI search feature can retrieve pages or other records, then ask a model to write a combined response and attach links. That response is a new layer over the material it found; it is not the source material itself.
There is no single design shared by every product. Google describes its Search AI features as combining a Gemini model with Search ranking systems and, for some questions, generating related searches in parallel. Its Gemini API documentation describes a similar grounded-search flow: the model can decide to issue one or more searches, process results, and return an answer with source annotations. Other products may use different indexes, search providers, models, and citation rules.
That distinction matters. A model answering from its learned parameters, a browser connected to live search, and an answer engine that retrieves pages are different tools. Check which one you are using before assuming the answer is current or web-verified.
Google’s description is useful as a concrete example, not a universal specification. Its documentation explains query fan-out and retrieval for its own generative Search features. A person using another service should look for that product’s own documentation and verify whether the response actually searched the web.
