A social networking site is a website where an individual person can set up an online profile, describing about his or her interests and add links to other people profiles. Social networking sites users are able to post personal information, photographs, videos, blog entries and user can communicate with instant messaging, e-mail or site mail, notes and comments, file sharing, forums or other types of discussion groups and so on. Social networking sites also be used to describe community-based web sites, online discussions forums, chatrooms and other social spaces online. This services are designed to build upon interactions to create communities and provide the required software. Social networking is based on a structure that allows people to both express their individuality and meet people with similar interests. These websites functionality is like an online community of internet users. Many of these online community members share common interests in hobbies, religion, or politics. A social networking service is focuses on building and reflecting of social networks or social relations among people, who share interests and activities. A social network service essentially consists of a representation of each user, social links and a variety of additional services. People use social networking sites for a huge number of personal reasons. Some may want an easy way to keep in touch with hi or her friends and family, some may use it for business related work and others may use it for dating. All over the world social networking sites are popular with people generally the teenagers.