# NotebookLM prompt: explain a difficult concept

Source: https://nlmexporter.com/guides/prompts/concept-explainer-prompt  
Section: Prompts  
Last verified: November 2026  
Plan: Free

Use it when a definition is not enough and you need to see how an idea works. Paste the prompt below into the NotebookLM (Gemini Notebook) chat and replace the parts in square brackets. It tells NotebookLM to answer only from your sources, cite them and flag what they do not cover.

## Quick facts

| Item | Detail |
| --- | --- |
| Works in | NotebookLM / Gemini Notebook chat, and the customise box of Studio items |
| Sources needed | Sources that explain the concept, ideally with an example. |
| Cost | Free to copy. Saving it in the extension is free for up to 10 plain prompts. |

## The prompt

```text
Explain [CONCEPT] as these sources present it.
1. One-sentence definition.
2. Why it matters in this subject.
3. A step-by-step example from the sources.
4. What it is often confused with, and how to tell them apart.
5. One question to test whether I understood.
Mark any analogy you add as your own.

Use only the sources in this notebook. Cite the source for every claim. If the sources do not cover something, say "not covered in the sources" instead of filling the gap.
```

## How to use it

1. Open the notebook and tick only the sources this question is about.
2. Paste the prompt into the chat and replace every part in [SQUARE BRACKETS].
3. Open two or three citations in the answer to confirm they say what the answer claims.
4. Save the answer as a note, then keep it: [Export to Markdown](https://nlmexporter.com/guides/export/notes-to-markdown).

## Adapt it

- Add "explain it again assuming I know [PRIOR TOPIC]".
- Ask for the explanation as a short script for an Audio Overview.

> NotebookLM can misread or over-generalise a source. A prompt reduces that; it does not remove it. Check cited passages before you rely on an answer.

## Frequently asked questions

### What should be in the notebook before I use the explain a difficult concept prompt?

Sources that explain the concept, ideally with an example.

### Why does the prompt ask NotebookLM to say what is not covered?

Because a grounded tool is most useful when it shows the edges of your sources. An explicit instruction to flag gaps reduces confident answers that the sources do not support.

### Does this prompt work in Gemini Notebook?

Yes. Gemini Notebook is the new name of NotebookLM since July 16, 2026. The chat works the same way: it answers from the sources you select.

## Related guides

- [Export NotebookLM notes to Markdown](https://nlmexporter.com/guides/export/notes-to-markdown)
- [NotebookLM prompt: better flashcards](https://nlmexporter.com/guides/prompts/flashcard-generation-prompt)
- [NotebookLM prompt: study plan for the time you have](https://nlmexporter.com/guides/prompts/study-plan-by-time-budget-prompt)
- [NotebookLM prompt: teach-back check](https://nlmexporter.com/guides/prompts/teach-back-check-prompt)
- [NotebookLM prompt: study guide from your sources](https://nlmexporter.com/guides/prompts/study-guide-from-sources-prompt)
- [NotebookLM prompt: exam practice questions](https://nlmexporter.com/guides/prompts/exam-practice-questions-prompt)