Prioritize with Note Tags in Office OneNote
Note tags help you to know and find what’s important in your notes (such as ideas or actions), to indicate what level priority or type each item is, and to recall these items easily. Names and icons associated with note tags can be customized to meet your needs.
To add a note tag:
1. Click the content that you want to tag.
2. On the Insert menu, click Note Tags.
3. Choose from the list of note tags.