Vertex AI's website-search capability that lets an owner run an AI-Mode-style search over their own content, confirming the Prepare→Retrieve→Signal→Serve flow.
Site search in AI Mode refers to Vertex AI's website-search capability, which lets a site owner test and tune an AI-Mode-style search experience over their own content. It's useful evidence because it confirms, in Google's own product, the simplified flow behind AI Mode: Prepare → Retrieve → Signal → Serve.
The Enterprise edition adds extractive answers (pulled verbatim from your documents), image-as-query search, and generative summaries. Turning on advanced website indexing raises refresh frequency and lowers latency, while advanced LLM features unlock search summarisation, follow-up questions and richer generative answers.
For AI-SEO practitioners it's a controlled sandbox to see how a Google-style system prepares and retrieves your pages before serving an answer — a close cousin of grounding and relevance engineering.
