What is the _messagebus user group and can I delete it?

I recently migrated to a new Mac running Ventura, and it looks like it migrated three user groups. I've figured out what the first two are and am going to delete them, but I can't figure out what the last one is. Is _messagebus something I need? Can I delete it? No user account got migrated as being in that group (or any other group, for that matter). Thanks!