It's called retrieval augmented generation (RAG) and there's no extra training. The data (e.g. web search result) is given as input to the LLM. If you search

It's called retrieval augmented generation (RAG) and there's no extra training. The data (e.g. web search result) is given as input to the LLM. If you search for "retrieval augmented generation" you'll find papers, tutorials, videos etc about it.