A breezy way to tag your research or learning notes is with the digital garden system.
This is a good way to return to notes and ideas you may have forgotten about to flesh them out.
An example of such a tag system would be:
- Seedling
- Sapling
- Tree

🌱 Seedling
The note is in the initial stage, a few sentences long.
🌴 Sapling
The note is in the middle stage, almost done.
🌳 Tree
The note is done, or as complete as it can be for now.
♻️ Review/Reread
Optional: you can put a review/reread tag for notes that are complete, but you may need the knowledge for later.
Full Forest
You can use any other terminology for your notes, or even add more stages.
Good luck building your forest of knowledge!