I didn't notice we didn't already have a roll20 tag for the pretty big virtual tabletop located at roll20.net. I added a few tags to a new question and afterwards clicked the roll20 tag to see the tag-wiki for it out of curiosity; and then noticed it not only didn't have a tag wiki, but it only had 1 question - the one I'd just added it to.
I will admit a complete lack of knowledge regarding tag making etiquette - should I undo my tag creation?
(This popped up in the similar questions list while I was writing, very much related: Is it worthwhile to add a "roll20" tag to the main list?)
Update: After reading and re-reading other meta posts and the tag creation privilege, I believe the tag to be worthwhile and will go ahead and start making a tag-wiki for it and tagging existing appropriate questions, but I want to leave this question up so more experienced users can still weigh in and confirm my opinion or explain why I'm wrong.