Date Added: Sep 2010
The Internet has enabled people to connect to each other, regardless of time and space. This lead to new phenomena, known as social networking through social network sites such Facebook, and Friendster. In social network sites members find new kinds of exchange, which is information exchange. Memberships in many social network sites are free, which means that everyone is free to join or leave it. In that case social network providers must ensure that members keep using their site.