How to Study With NotebookLM: Sources, Audio and Limits

Most AI assistants will answer any question you ask, whether or not they know. NotebookLM takes the opposite approach: you give it your sources, and it answers from those, with a citation you can click back to the exact passage. Google now also brands it Gemini Notebook.

For studying, that constraint is the whole value. A chatbot can invent a confident explanation of a topic your syllabus covers differently. A notebook built from your lecture slides, textbook chapter and three papers can't wander as far, and when it does, the citation shows you.

What the free tier actually gives you

Google's plans page lists the limits by tier:

	Free (Standard)	Plus	Pro
Notebooks per user	100	200	500
Sources per notebook	50	100	300

Fifty sources per notebook is a lot for one subject: a semester's slides, a textbook chapter, past papers and your own notes all fit. Google says it's available in browsers "to all users above the age of consent (or applicable in your country) in supported countries," with a separate country list for the mobile app.

On data, the free tier's terms say your content "is not used to train Gemini Notebook unless you provide feedback," and that feedback you submit may be reviewed with its full context. Workspace and Education accounts get stronger commitments: no human review and no training, even on feedback. If you're uploading someone else's unpublished work or anything confidential, read those terms before you upload.

Set up a notebook for one subject

1. Create one notebook per subject or exam, not one for everything. Answers get sharper when the sources are narrow.
2. Add your real materials: lecture slides, the chapter PDF, your own typed notes, past question papers, and two or three papers your teacher recommended.
3. Add your syllabus as a source. It's the cheapest way to make the notebook answer in the shape your exam expects.
4. Let the automatic extras generate. Google notes that when sources are first added you may get a report, flashcards, an infographic, a slide deck, an audio overview or a video overview, generated once, and that these "do not contribute to limits."

Five ways to actually study with it

Ask it to quiz you, not to explain. "Ask me ten questions on chapter 4, one at a time, and tell me what I got wrong." Being tested is what moves things into memory; reading a summary isn't.

Turn the notebook into audio for your commute. The audio overview turns your sources into a discussion you can listen to. It's the single best feature for revision on a bus or during a walk, and it's built from your material, not the internet's.

Find the gaps between sources. "Where does the textbook disagree with the lecture slides?" is a question no chatbot can answer about your course, and a notebook can.

Make it mark your answer. Write your answer to a past question, paste it in, and ask it to grade against the source material and point out what's missing. Then read the cited passage.

Follow the citations, every time. The citation is the feature. If a point matters for your exam, click through and read the original sentence. That habit also protects you from the rare case where the summary skews the meaning.

What NotebookLM is not good for

• Finding sources. It works with what you give it. Use Consensus or Elicit to find papers first; see our AI research tools list.
• Current events. If it isn't in your sources, it isn't in the answer.
• Doing the assignment. It will happily draft an essay. That's where your course's AI policy and academic integrity rules apply; our guide to AI tools for students covers what gets flagged and how to protect yourself.
• Replacing your notes. Writing notes is part of learning. Use the notebook to test and fill gaps, not to skip the work.

NotebookLM vs a normal chatbot

	NotebookLM	ChatGPT, Gemini, Claude
Where answers come from	Only your uploaded sources	Training data and the web
Citations	Back to your passage	Varies, sometimes none
Best for	Revision, a fixed syllabus, research sets	Explaining a new topic from scratch
Risk	Misses context your sources lack	Confident but unsourced claims

Use both: ChatGPT's study mode or Gemini to understand a concept the first time, and a notebook to revise against the material you'll be examined on.

FAQ

Is NotebookLM free?

Yes. The free Standard tier allows 100 notebooks per user and 50 sources per notebook, with Plus and Pro raising those to 100 and 300 sources respectively.

How many sources can I add to one NotebookLM notebook?

Fifty on the free tier, 100 on Plus and 300 on Pro, according to Google's plans page.

Does NotebookLM use my uploads to train Google's AI?

Google says the free tier doesn't use your content for training unless you provide feedback, and that feedback may be reviewed with its full context. Workspace and Education accounts aren't reviewed or used for training at all.

Can NotebookLM make flashcards and audio?

Yes. Google says reports, flashcards, infographics, slide decks, audio overviews and video overviews can be generated when sources are first added, and that these don't count towards your usage limits.

Is NotebookLM better than ChatGPT for studying?

For revising material you already have, yes, because it answers only from your sources and cites them. For learning a topic from scratch, a general assistant explains better.