I don’t use tags as a way of querying topics. Instead, I use a use a small set of tags (
FILETAGS in org-mode) to drive functionality for task management and notes.
project tag is used to connect tasks with org-agenda. That way my notes are not separate from day-to-day work.
private tag or
draft tag is used determine whether or not to publish the note publicly. I sometimes search for
drafts to finish them up later though I don’t always come back.
entity tag indicates a person or company. This is similar to an at mention to associate a task with a person. Using org-roam back, I can query tasks by person so I can follow-up on delegated tasks or review work later.