#feditips There are actually Fediverse groups called guppes hosted at <a.gup.pe>. It's a bit like Facebook groups, but decentralized. If you follow a guppe, for example @philosophy, you get access to the group's posts on your timeline. If you tag a group like @philosophy, you post to the group and your post will show up in the timelines of the group members.
A word of warning though: according to the FAQ, there are currently no moderation tools since it's quite decentralized.
FAQ here: <https://github.com/immers-space/guppe/wiki/Guppe-Groups-FAQ>
Basically, guppes are like hashtags but they show up in your timelines.