Social networking involves individuals connecting with others in online communities or networks. A social network is defined as a social structure made up of people or groups connected by relationships. Popular social networking sites allow people to present themselves and connect with others based on shared interests, work, college attendance, or for romantic connections. The top social networking sites are Facebook, Twitter, LinkedIn, and Myspace. Social networking has grown tremendously in popularity due to its ability to connect people inexpensively across distances. Statistics show people, especially youth, now spend a significant amount of time on social media each day.