it's (the abbreviated form of a ) community, not sure if all clients show them, and to what degree they show their functionalities lol. Can't even seem to link to a group in amethyst ;_;

https://satellite.earth/n/DungeonSynth/npub1njst6azswskk5gp3ns8r6nr8nj0qg65acu8gaa2u9yz7yszjxs9s6k7fqx/note17zuazrrj6fz7e6ehgjdddrzf8am9wvavcexl724um7zq0ulpzw6sv8mzlc