Community noticeboard

A question about category extensions
First of all, having this community noticeboard is a great idea. I've wanted to ask just general stuff before now but there was never a place to post them. I know my question isn't directed at Meta but it is Miraheze related. I was wondering if anyone knows how the categories work on All the Tropes. I have noticed the same or similar on Public Test Wiki. I use categories extensively and the category system in place, especially on ATT, seems like the perfect tool. What is it called and is it even a possibility to get something like that installed on my wiki? If yes, I'll ask in the appropriate place, thanks. Borderman  talk 21:12, 22 July 2017 (UTC)