NotebookLM is a Google tool that uses artificial intelligence to help users organize and analyze information from various sources, including Google Docs, Slides, PDFs, text files, and web pages. The tool allows users to upload these sources, create summaries, ask questions about the content, and generate various formats, such as FAQs, timelines, and outlines. Users can also create notes, pin quotes, and combine them for further analysis. The tool aims to help with tasks like research, writing, and note-taking by providing a comprehensive and interactive platform for working with information.