10 Top Social Networks A social network is a website that allows people with similar interests to come together and share information, photos and videos. People engaged in social networking may be doing so as a personal or a business endeavor. Those who engage on social network sites as a personal endeavor interact by using various forms of media to discuss their lives and interests. The most popular social networks for this type of familiar interaction include Facebook, Google+ and Twitter . Although these and other social networks may be used for business purposes -- especially marketing -- social networks exist specifically for enterprise social networking . Popular enterprise social network platforms include Social cast and Yammer . Ideally, employees who are tasked with participating on social networks are provided with a social ...