Gemini or NotebookLM? Start with the task.
GoPomelo Academy

Choose a starting point for your workflow: open-ended drafting and ideas, or questions about a selected set of documents. The tools overlap; the task is what matters.

1. For brainstorming or a first draft, consider Gemini. Give it the audience, context, and desired format.
2. For exploring selected documents and checking cited passages, consider NotebookLM. Add the sources and define your question.
3. Review the result whichever tool you choose. Features vary by account, and both tools can make mistakes.

PROMPT
Before choosing a tool, complete this brief: My task is ___. My audience is ___. My source documents are ___. The output should be ___. I will check the result by ___.

CHECKLIST
[ ] The task and intended audience are clear.
[ ] You know whether the answer needs to be tied to specific documents.
[ ] The output format is defined.
[ ] You have a way to verify the result.

https://academy.gopomelo.com/resources/gemini-or-notebooklm
Google: using notebook chat and citations: https://support.google.com/notebooklm/answer/16179559?hl=en
Google: using Gemini Apps: https://support.google.com/gemini/answer/13275745?hl=en