Foursquare is a geosocial networking service that connects users and locations through mobile devices. By creating an account and downloading the app to their smart phone, users can check in at venues listed on the Foursquare website. Users can see what venues their friends like to visit, read comments and tips they leave about each venue, and earn badges and special offers for checking in to certain locations.
Users can create their own Foursquare profiles, but must have a smart phone and data plan to participate in the service.
Checking in to various locations will unlock badges and special features of the site. Pictured below are several badges available to users who check in to campus locations.