NotebookLM is an experimental AI notebook designed to help people gain critical insights faster by using language models paired with their existing content. It acts as a virtual research assistant, summarizing facts, explaining complex ideas, and generating new connections based on selected sources. Users can upload Google Docs and ask questions or generate ideas related to the content. NotebookLM aims to assist users in synthesizing information and making connections more efficiently. It is an experimental product developed by Google Labs.