https://techcrunch.com/2021/09/08/twitter-communities/

Twitter is a useful place for following breaking news and keeping up with what the people you’re already interested in are doing, but its relative dearth of discovery features and a lack of organized community spaces make it pretty hard to connect with anyone you aren’t actively seeking out.

The company is thinking about changing that. Twitter is on a tear with new features lately and its latest experiment, called Communities, is designed to make it easier to connect around shared interests. Users will be able to join these new social hubs and tweet directly to other people with shared interests rather than their regular group of followers. Those tweets will still be public, but replies will be limited to other community members.