Last summer, Google launched NotebookLM, its "AI-first Notebook," which works with the content you input into your notebook to offer tasks such as summarizing the content of the document, brainstorming, explaining, and providing you with key topics and questions you can ask to understand the material better.
Also: How to use Google's AI-powered NotebookLM to organize your research
The sources you can insert include a Google Doc, PDF, or copied text, and then you can ask questions about the content or have it auto-generate content from your inputs on its own. This can be especially helpful if you are a student and input all of your class notes and materials into this one place, which could not only help you stay organized but also add AI assistance to your notes.
To test it out, I inserted a PDF of my own article, and then, within seconds, I was provided an accurate AI-generated summary. You can see my results in the image above.