Why Social Networking?
Through social networking, people can use networks of online friends and group memberships to keep in touch with current friends, reconnect with old friends or create real–life friendships through similar interests or groups. Besides establishing important social relationships, social networking members can share their interests with other like–minded members by joining groups and forums. Some networking can also help members find a job or establish business contacts.
(this article is part of a longer piece from http://social-networking-websites-review.toptenreviews.com/)