To quickly add a link to another note, type » to have a list of your notes appear. Begin typing to narrow your results, then select the note you want to link to. When you use this shortcut, the link title always matches the current title of the linked note.

— Add links in Notes on Mac

Was making a checklist note that was a checklist of other notes, and thought there must be a way to link to a note.

I right clicked the note I wanted to link to, and it wasn’t immediately obvious if this was possible. I’m used to how Slack “Link to message” URLs work.

The >> syntax is something I’d never discover on my own, but at least I probably won’t forget.