Google NotebookLM is now Gemini Notebook
Google has relabeled its NotebookLM system as Gemini Notebook. It is intended as a personalized AI research assistant that syncs with your uploaded documents, lecture slides, and research papers to generate instant summaries and synthesize them into custom study guides, code-driven data charts, or interactive audio overviews. UMBC faculty, staff, and students continue to have some free access, but the specific version and privacy protections depend on which account you use to log in. You can read more here and on Wikipedia.