You can search for groups and get basic information about them. If a group administrator decided to hide a group, you will not be able to see it unless you have been invited to it.
This page can list the groups you are related to in some way.
You can see the groups you own or are a member of, as well as groups you have been invited to or have asked to join.
When in a group, you can share your own portfolio pages with the other members and participate in group activities such as discussion forums.