Real friends... Not random people you have added for marketing. Not your online business partners/friends. But your actual real life friends.
I visited facebook just today because I received an email about a new friend. I have about 22 friends. * Whats so good about facebook? and why so many people like it?
I guess its because a lot of my school, college, uni and work friends as well as family are on there unlike any other network. Just helps me keep in touch with people.