A social networking service is a platform to build social networks or social relations .
A social networking service is a platform to build social networks or social relations among people who share interests, activities, backgrounds or real-life connections. A social network service consists of a representation of each user , his or her social links, and a variety of additional services.
This is a list of major active social networking websites and excludes dating websites. For defunct social networking websites, see List of defunct social networking websites.