Chats. Social networking service. A social networking service (also called SNS) is a platform to build social networks or social relations among people who share 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 networks are web-based services that allow individuals to create a public profile, to create a list of users with whom to share connections, and view and cross the connections within the system. Most social network services are web-based and provide means for users to interact over the Internet, such as e-mail and instant messaging.