NotebookLM is Google's AI-powered research and note-taking tool, built on Gemini, that grounds its answers specifically in documents, audio, or links a user uploads rather than general web knowledge. Its ability to generate audio-overview-style discussions summarizing uploaded source material has become one of its most widely shared features since launch.
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Free, with expanded limits for Google AI Pro/Ultra subscribers
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AI-assisted research and note-taking grounded in a user's own uploaded sources