In addition to creating a group of your own or being invited to a group, you can join other groups. Some of the group types have different requirements before you become a member.
1. To join an Open or Members Only group, navigate to the group and click the Join this Group button in the top right corner of the group header.
3. To join a Private group, navigate to the group. You will see a description and a button “Request access to this group”. Click that button and the group owner will review your request.
4. Invitations to a group will be presented to you in your Inbox as a notification.