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This article explains Google's AI tool "NotebookLM" in a way that's easy to understand, even for beginners.
NotebookLM is a free AI research tool provided by Google. When you upload PDFs, Google Docs, YouTube videos, and other materials, the AI understands the content and can summarize it or answer your questions.
"LM" stands for "Language Model," referring to AI technology that understands and responds to text much like a human would. Because NotebookLM learns only from the materials you upload, it's known for delivering accurate and reliable answers.
Japanese language support was added in June 2024, and as of 2026 it's available in more than 80 languages. Since even the free version offers plenty of features, it's being used widely by everyone from students to business professionals.
You can upload up to 50 sources — PDFs, Word files, web pages, and more — in the free version. The AI reads the content and automatically summarizes the key points.
Ask "What are the main points of this material?" or "Tell me about ○○," and you'll get an instant answer. Every response also includes citations (which source and where in it the information appears), so you can verify the reliability of the information.
This is NotebookLM's most talked-about feature. Two AI hosts engage in a conversation to explain the content of your uploaded materials — it feels just like listening to a radio show or podcast.
You can choose from four styles: "Deep Dive," "Brief," "Critique," and "Debate." Since you can learn by listening while commuting or doing chores, it's a great way to make the most of your time.
This is a new feature added in March 2026. Based on your uploaded materials, the AI automatically creates an explanatory video complete with slides and narration, making it easier to understand content visually.
It can be used for creating presentation materials or educational video content for studying.
NotebookLM offers a range of other useful functions, including Mind Maps to visualize the structure of information, automatic presentation slide generation, and the ability to create flashcards and quizzes.
It comes packed with features that can greatly improve your efficiency in both learning and work.
Even beginners can get started easily. Follow these steps to give it a try.
Go to the official NotebookLM website (notebooklm.google). Sign in with your Google account and create a "New Notebook." Creating an account is free.
Upload the materials you want to analyze — PDF files, Google Docs, webpage URLs, YouTube video links, and more. You can upload them easily by drag and drop.
It's also possible to upload multiple sources at once.
Type your question into the chat field at the bottom of the screen. Feel free to ask things like "Tell me the key points of this material" or "Explain ○○ in detail." The AI will respond right away.
From the "Studio" panel on the right side of the screen, you can select features such as Audio Overview and Video Overview. Click "Generate Audio Overview" and an audio explanation in podcast format will be ready within minutes.
Generated audio and videos can be downloaded and saved.
More than enough in the free version: Even the free version allows 50 chats per day and the creation of 100 notebooks. For personal use, the free version is often more than sufficient.
Citations are clearly shown: AI responses always indicate "which source and where in it the information comes from." You can use it with peace of mind, since you can verify the reliability of the information.
Simple and easy to use: You can operate it intuitively without any specialized knowledge. No complex setup is required — you can start using it right away.
Packed with features: Summarization, Q&A, Podcast, video generation, mind maps, and more — one tool covers a wide range of needs.
Quality depends on your source materials: If you upload materials with many typos or outdated information, the quality of the AI's responses will suffer as well. It's important to use materials that are as accurate and up-to-date as possible.
The free version has limits: There are caps on the number of questions you can ask per day and the number of materials you can upload. Heavy users may need to consider the paid version (from ¥1,200/month).
An internet connection is required: It cannot be used offline. You need a constantly connected internet environment.
It's especially recommended for the following types of people:
NotebookLM is a free AI research tool provided by Google. Here are the key takeaways from this article:
NotebookLM is a tool that can dramatically improve your efficiency in organizing information and learning. Since you can get started for free, why not give it a try? Your work and study will surely become more enjoyable and more efficient.
This article is a cross-post from AI Friends.
