A social network forms a network of social interactions and establishes personal relationships between people, including friends or colleagues, based on a common interest. It connects people using a dedicated online application that enables users to communicate and share interests, posts comments, sends messages, shares images and videos. Online social networks facilitate easy communication among individuals using simple web interfaces. There are several online social networking sites such as Facebook, LinkedIn, and Twitter. Each of these sites has its unique style, functionality, and patterns of usage. Social network sites allow the users to create profile pages, offers the ability to personalize the look and feel of the home page, explore relationship and connections, and ability to customize the privacy control. Social network sites contain millions of users and a large volume of data shared among the users. Social network analysis (SNA) is the mapping and measuring relationships and flows between people, groups, organizations, computers, URLs, and other connected information or knowledge entities. The nodes in the network are the people and groups, while the links show relationships or flows between the nodes. SNA provides both a visual and mathematical analysis of human relationships.