1 - It's easy-and fun
Starting a group simply means creating a group page-similar to your profile page-with its own web address and features. As group owner, you can post blog entries, create a photo or video gallery, designate moderators and more.
2 - Control and privacy
You can choose to make your group public (come one, come all) or private (you approve any member you invite or who asks to join).
3 - Get the word out
Every group profile has its own web address, so tell your friends about your group's URL! Visitors to the group page can click the "Join Group" link to join.