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NotebookLM Adds Deep Research and Support for More Source Types
November 14, 2025
MOUNTAIN VIEW, California, Nov. 14 -- Alphabet Inc. a provider of internet services (Google), issued the following news:

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NotebookLM adds Deep Research and support for more source types

By Anuja Agrawal, Quality Lead and Shan Wang, Senior UX Designer

The latest NotebookLM update introduces Deep Research, helping users add diverse, high-quality sources and broadens the types of content you can analyze, including sheets and Word docs.
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