Google is giving NotebookLM a serious upgrade with a new feature called Deep Research—basically a built-in personal researcher that handles tough online questions and turns them into clear, structured reports.
Instead of just asking a question and hoping for the best, you can pick a research style and let Deep Research plan the whole process. It browses relevant sites on its own, gathers info, and then hands you a detailed briefing. The best part? It works quietly in the background, so you can add more sources whenever you want without messing up your flow or leaving the notebook.
NotebookLM also now supports more file types, including Google Sheets, Drive URLs, PDFs in Drive, and even Word documents. That means you can quickly pull in a spreadsheet to summarize it or drop in multiple Drive files for faster analysis.
These updates keep building on everything Google has added since NotebookLM launched in late 2023—like Video Overviews, which turn dense material into easy-to-follow explainers, and earlier features such as Audio Overviews, which generate podcast-style summaries of your documents. And if you’re using your phone, you’re covered too: Google’s Android and iOS apps arrived earlier this year. All these new improvements should roll out to everyone within a week.
