Vertex AI search and Conversation

[VishalBulbule]

I am exploring Vertex AI search and conversation to build some usecase within my organization. I am looking for more technical details around vertex AI search and conversation . I have below queries
1. Does Vertex AI search and conversation use RAG for data retrieval?

2. If Yes how RAG works in Vertex AI search and conversation , is it within datastore ?

3. When we create datastore , does it create embedding and load in vector database at the backend?

Please someone help with relevant document/answers.

@xavidop help here please.