Whether you just refer to them, or you continuously edit them. Asking because it’s always fun to hear about other peoples’ use cases and experiences with Obsidian. And because I was thinking about some reference notes I made that I do not actually use for one reason or another, but it boils down to something like this: https://xkcd.com/1205/. I miscalculated how much pain or time making the reference resource would save me. That note gets 0 visits. Meanwhile, other notes I made get near-daily references, and I feel so glad that I made that note because it makes my life a little easier or better.
I have a note called Random that I use to drop content that doesn’t need to be in a note, it won’t live a long lifetime, just scratch pad stuff. That one gets an entry multiple times a day.
Otherwise it’s whatever note(s) I have for a currently running project. Parts list, decision notes, tests run and their status.