According to NotebookLM on Twitter, the platform has introduced a new chat history feature that allows users to close a session and resume it later without losing their conversation. This rollout enhances the usability of AI-powered note-taking by enabling seamless session continuity and personalized data management. Users can delete chat history at any time, and in shared notebooks, chat history remains private to each individual. This development addresses a key user need for persistent and secure conversational context, streamlining workflows and boosting productivity for professionals and students leveraging AI in their daily note-taking and research tasks (source: @NotebookLM, Nov 13, 2025).