@dplanella we’re building navigation based on tag intersections, you’d be welcome to join in. We’d be making tag intersections the main way to move around the site, either by typing them into a search bar, or by clicking to add a new tag to your current location so the users experience branches out like a tree.
I assume you mean that you want notifications if someone posts there.
@syl 's Docuss plugin allows watching a tag (although its not its main purpose so i’m not sure if it fits your use case, but it could inspire a specialised solution). Syl, you use tag intersections a lot, can users watch an intersection?
I tried to find a page that might also be useful which i found a while back, but i drew a blank. I found this: Discourse Meta for user stats, but i thought i had previously seen a page like this which filters by category and shows who the top posters in that category are. I’ve lost it though.