Webfilter > General Interest > Personal > Social Networking

FortiGuard describes the category as, "A social networking site is a platform to build social networks or social relations among people who share similar interests, activities, backgrounds or real-life connections. A social network service consists of a representation of each user (often a profile), his or her social links, and a variety of additional services. Social network sites are web-based services that allow individuals to create a public profile, create a list of users with whom to share connections, and view and cross the connections within the system."

[link]http://fortiguard.com/webfilter[/link]http://fortiguard.com/webfilter

So Facebook, Twitter, Instagram, Google Plus, and so on.