-Privacy control mechanism based on policy frameworks that are rich in semantic web technologies to control information flow in social networking applications. The privacy control mechanism Provides users of the system better control while sharing information than the state of the art systems Combines dynamic user context, For instance, current time, current location or current activity of the user Online social networking is viewed by many as the next new paradigm in personal, professional and organizational networking and marketing. (Social media are the tools that people use to do social networking, such as Facebook, LinkedIn and Twitter.) The following sections first give a broad overview of the movement of social networking, including basics about each of the most popular tools. The next section describes how to use the tools for personal, professional and organizational networking and marketing.