Google NotebookLM is an AI-powered research assistant that helps users analyze and extract insights from various content sources like PDFs, websites, and audio files. Popular among students and researchers, it uses Gemini 2.0 to create summaries, make connections between topics, and generate study materials with accurate source citations. The tool can transform uploaded content into engaging audio discussions for on-the-go learning, while maintaining user privacy by not using personal data for training purposes.