Chatter groups let you share information with specific people. For example, if you're working on a project and want to share information only with your team members, you can create a Chatter group for your team. Chatter groups include a list of members, a Chatter feed, and a photo. You can create the following types of Chatter groups:

• Public: Anyone can see the group's updates, but only members can post updates. Anyone can join a public group.
• Private: Only members can see and post updates. The group's owner or managers must add members.