Overview
NotebookLM is Google's AI research assistant. It turns uploaded documents, PDFs, web pages and videos into a dedicated knowledge base, answers only from those sources, and cites where each answer comes from. Audio Overview converts material into a two-person podcast, while Video Overviews produces a narrated video summary. On October 19, 2026, Slide Decks and Video Overviews gained collaborative controls: pick a topic, format, length, language and visual style, then review and edit the outline or production notes before generating. The feature is open to Pro and Ultra subscribers.
Key Features
- Grounded answers with citations: Replies stay within the material you uploaded, and every claim links back to its source passage.
- Audio Overview: Turns documents into a two-person podcast conversation for listening on a commute or in spare moments.
- Video Overviews: Generates a video summary with AI narration and visuals from the sources in a notebook.
- Collaborative slide and video controls: Choose topic, format, length, language and visual style, then edit the outline or production notes before generating.
- Multiple sources and notebooks: Merge several notebooks into one knowledge base and organize material by project.
- Reports and notes: Consolidates scattered notes into structured summaries and research reports.
Use Cases
- Upload a paper, listen to the Audio Overview first, then question the methods section and check each citation.
- Put competitor sites, filings and interview transcripts in one notebook and skim the conclusions through a video overview.
- Draft a slide deck with collaborative controls, adjust length and language to the meeting, then add pages by hand.
- Merge policy documents and meeting notes into a shared base so new team members jump straight to the original clause.
- Turn lecture handouts and recordings into a podcast and summary, then search by topic while revising.
Pros
- Answers stay inside the uploaded material and carry citations, which keeps fact-checking cheap.
- Audio and video overviews cover both listening and viewing, so the same source works for different moments.
- Slide and video overviews have supported collaborative controls since October 2026, so output can match a given format, length and style.
- Multiple notebooks and source merging make it practical to organize material by project and search across documents.
- The free tier covers the core workflow, with Pro and Ultra adding higher limits and collaborative generation.
Pricing
NotebookLM is free for the core workflow, with limits on sources and generations. NotebookLM Plus is $12 per user per month and raises source counts and usage while adding enterprise security features. Collaborative slide and video overviews are available to Pro and Ultra subscribers. Check the official site for current quotas.
Summary
NotebookLM is Google's AI research assistant. It answers only from the material you upload and cites its sources, while Audio Overview and Video Overviews turn that material into a podcast or a narrated video. Since October 19, 2026, slide decks and video overviews support collaborative controls so output can be tailored before generation. It fits researchers, students and teams that want to turn documents into a searchable base.
Version History
- NotebookLM adds collaborative controls for Slide Decks and Video Overviews (2026-10-19): Google added collaborative controls to NotebookLM on October 19, 2026, for Slide Decks and Video Overviews. Users can pick a suggested topic from their sources or write their own, specify format, length, language and visual style, then review and edit the slide outline or video production notes before generating. The feature is available to all Pro and Ultra subscribers.