Google is adding a feature called Deep Research to NotebookLM.

Its AI-powered research assistant allows it to browse a large number of websites and produce in-depth reports for users’ notebooks that include annotated source lists.

On Friday, November 14, 2025, the Deep Research feature began to roll out, and users in some countries should get the update in a week or two.

Google is introducing a new option for NotebookLM users to design custom video overview styles using text-based prompts.

Additionally, users will be able to end a session and resume it later without losing any of their earlier work thanks to a fresh chat history prompt.

NotebookLM has confirmed that all mobile users can now access flashcards and quizzes.

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