| Group limits | A user can join up to 300 groups; an org can have 30,000 groups | |
| Create groups permission | Create and Own New Chatter Groups, on by default | |
| Private group join | Ask to join; owner or manager adds the person | |
| Unlisted group join | No asking; owner or manager must invite | |
| Unlisted availability | Off by default; enable in Chatter Settings | |
| Unlisted vs admins | Modify All Data and View All Data see unlisted groups only as members | |
| Unlisted access for nonmembers | Manage Unlisted Groups permission | |
| Allow Customers | Private or unlisted groups only; access level can't change afterwards | |
| Customer visibility | Only their groups, those groups' members, and shared files; no records | |
| Private to public | Content becomes visible to all and pending requests are accepted | |
| Unlisted conversion | Owner or manager can open it up to private or public | |
| Broadcast Only | Only owners and managers post; members read and comment | |
| Records in groups | Allow records in groups (default on) plus the Add Record action | |