What is NotebookLM? It is Google’s AI research assistant that answers questions using only the documents you give it. You upload PDFs, Google Docs, web pages or videos, and it summarises them, cites the passages it used and can turn them into podcast-style audio. One update matters for anyone searching today: on July 16, 2026, Google renamed the product Gemini Notebook. Most people still search for “NotebookLM”, so this guide uses both names.
Quick answer: what is NotebookLM in one paragraph
NotebookLM, now called Gemini Notebook, is a Google tool that builds a private, source-grounded AI workspace from your own files and links. Unlike a general chatbot, it answers from your sources and shows citations. It can also create audio overviews, mind maps, quizzes, flashcards and reports from the same material.
Key takeaways
- NotebookLM is now officially Gemini Notebook, but it remains a standalone research product.
- It answers from your uploaded sources and cites them, which reduces made-up answers.
- Supported inputs include PDFs, Google Docs, Google Slides, websites, YouTube links and audio files.
- Audio Overviews turn your sources into a two-host conversation.
- Google says it does not use your uploaded sources or chats to train its models.
- Free use is generous, and paid Google AI plans raise the limits.
The NotebookLM name change, explained
Google first showed the idea at I/O 2023 as Project Tailwind. It launched as NotebookLM, where “LM” stands for language model. In July 2026 Google announced that NotebookLM is now Gemini Notebook. According to Google, it stays a standalone product focused on research, while working more closely with the Gemini app and Google Search.
| Question | Answer |
|---|---|
| Is NotebookLM still the same tool? | Yes. The core notebook, sources and chat experience carried over. |
| What is new? | Tighter sync with the Gemini app, and code execution for data analysis on higher plans. |
| Will notebooks reach Search? | Google says notebooks are coming to AI Mode in Search, without a firm date. |
| Why do people still say NotebookLM? | The name was used for three years, and search habits change slowly. |
Google reports more than 30 million users and over 600,000 organisations. That scale explains why the rename generated so much confusion.
How it works: what is NotebookLM doing behind the scenes?
The key idea is grounding. A normal chatbot draws on everything it learned in training. NotebookLM restricts itself to the notebook you build. Therefore, its answers are tied to your material, and each claim links back to the passage it came from.
- Create a notebook. Think of it as a project folder with a built-in assistant.
- Add sources. Upload files or paste links.
- Ask questions. The assistant answers with numbered citations.
- Generate outputs. Create summaries, audio, quizzes or reports from the same sources.
Citations let you click through to the exact passage. That makes checking quick, which is the main reason researchers and students like it.
What sources can you add?
| Source type | Notes |
|---|---|
| PDF files | Papers, reports, textbooks, scanned documents with readable text |
| Google Docs and Slides | Imported straight from Drive |
| Websites | Public pages added by URL |
| YouTube videos | Uses the transcript, so the video needs captions |
| Audio files | Lectures and interviews are transcribed |
| Pasted text | Notes, emails, meeting minutes |
What can NotebookLM create from your sources?
This is where it separates itself from ordinary chatbots. After you add sources, the Studio panel offers several outputs.
- Audio Overviews: a conversation between two AI hosts about your material. Formats include a standard summary, a brief version, a critique and a debate.
- Video Overviews: narrated visual summaries.
- Mind maps: expandable diagrams of ideas and how they connect.
- Study tools: flashcards, quizzes and outlines.
- Reports and briefs: structured written summaries.
For a walk through twelve practical uses, see what NotebookLM does in real life.
Who uses NotebookLM, and for what
Because the tool starts from your own material, it fits very different jobs. Here is how a few common groups use it.
| Group | Typical notebook | What they ask |
|---|---|---|
| University students | Course readings and lecture slides | Which three themes will the exam cover? |
| Researchers | Twenty papers on one question | Where do these studies disagree on method? |
| Journalists and writers | Interview transcripts and background reports | Which quotes support this claim? |
| Small business owners | Contracts, manuals and policies | What does our supplier agreement say about delivery delays? |
| Product teams | User interviews and survey exports | What are the top five complaints, with evidence? |
How to start with NotebookLM in five minutes
- Open the product from your Google account and create a new notebook.
- Add three to five sources you already know well. This lets you test its accuracy.
- Ask a question whose answer you can verify, then click the citations.
- Generate a short Audio Overview to hear how it frames your material.
- Add more sources only after the first set behaves the way you expect.
Testing on familiar material builds trust quickly. If an answer looks wrong, the citation usually shows why, such as an ambiguous sentence or a missing source. That feedback loop is what NotebookLM does better than a general chatbot.
NotebookLM limits and plans
Google changes limits often, so treat the figures below as a snapshot. They come from a tracker last verified in October 2026. Always confirm in your own account under Settings.
| Limit | Free | Plus | Pro |
|---|---|---|---|
| Notebooks | 100 | 200 | 500 |
| Sources per notebook | 50 | 100 | 300 |
| Chats per day | 50 | 200 | 500 |
| Audio Overviews per day | 3 | 6 | 20 |
| Words per source | 500,000 | 500,000 | 500,000 |
| Local file size | 200 MB | 200 MB | 200 MB |
Plus comes with Google AI Plus, and Pro comes with Google AI Pro. Workspace and education accounts follow different tiers, so do not assume these numbers apply to a work or school login.
What is NotebookLM doing with your private documents?
Google states that NotebookLM does not use your uploaded sources or conversations to train its underlying models. That is a strong point for personal research. However, sharing is a separate risk. Paid plans unlock wider sharing options, so check who has access before you share a notebook that holds sensitive files. For confidential business or client material, follow your organisation’s data policy first.
NotebookLM vs ChatGPT and Gemini: when to use which
| Need | Best fit | Why |
|---|---|---|
| Answers limited to your own documents | NotebookLM | Grounded in your sources with citations |
| Broad questions and brainstorming | Gemini or another chatbot | Draws on wider knowledge |
| Studying one textbook | NotebookLM | Quizzes and flashcards from that book |
| Writing from scratch | Gemini | Not tied to specific files |
If you use Gemini for writing tasks, our Gemini prompts collection gives you tested starting points. Browse more in the NotebookLM guides.
Common mistakes and how to avoid them
- Uploading too many unrelated files. A focused notebook gives sharper answers. Make one notebook per project.
- Trusting a summary without checking citations. Click through on any claim you will publish.
- Adding a YouTube video with no captions. No transcript means nothing to read.
- Expecting outside knowledge. If the answer is not in your sources, it may say so. That is a feature.
Frequently asked questions
What is NotebookLM in simple terms?
NotebookLM is a Google AI research assistant that answers questions using only the documents you add. It cites the passages it used, and it can create audio overviews, mind maps, quizzes and reports. Google renamed it Gemini Notebook in July 2026, but many people still search for the old name.
Is NotebookLM the same as Gemini Notebook?
Yes. On July 16, 2026, Google announced that NotebookLM is now Gemini Notebook. It remains a standalone research product and now syncs more closely with the Gemini app. Google also says notebooks are coming to AI Mode in Search, without giving a date.
Is NotebookLM free?
There is a free plan with generous limits. A tracker last verified in October 2026 lists 100 notebooks, 50 sources per notebook and 3 Audio Overviews a day for free users. Paid Google AI plans raise those limits. Confirm current numbers in your account settings.
Does NotebookLM use my data to train AI?
Google states that NotebookLM does not use your uploaded sources or conversations to train its underlying models. Even so, be careful with sharing settings and confidential files. Follow your organisation’s data policy for work or client documents.
What files can I upload to NotebookLM?
You can add PDFs, Google Docs, Google Slides, websites, YouTube links, audio files and pasted text. Local files can be up to 200 MB, and each source can hold up to 500,000 words. YouTube videos need a usable transcript to work well.
How is NotebookLM different from ChatGPT or Gemini?
NotebookLM answers from the sources in your notebook and shows citations, so it stays tied to your material. General chatbots answer from broad training knowledge and are better for open brainstorming. Use NotebookLM when accuracy against specific documents matters.
What NotebookLM means for how you research
So, what is NotebookLM in practice? The rename changes a label, not the idea. NotebookLM, or Gemini Notebook, works best when you treat it as a reading partner for a defined set of documents. Start with one project, add five to ten good sources and ask questions you can verify. If the results help, explore the audio and study tools next. You can find more on the Google Edits homepage, and you can see how we review tools on our how we test page.
Independent publication. Not affiliated with or endorsed by Google. Limits and prices change; verify in your own account.