The two basic types of groups - public and private - can have a dramatic effect on the nature of each group.

Public

Any eBay member can join a public group. Select this group type if you start your own group, and want to encourage lots of members to join.

Private

In order to join a private group, a member must send a request to the group leader, or receive an invitation. A group leader has the ability to declare a group full, meaning the group is no longer accepting new members.