A social network is a social structure made up of a set of social actors (such as individuals or organizations), sets of dyadic ties, and other social interactions between actors.
A social networking service or SNS (sometimes called a social networking site) is a type of online social media platform which people use to build social networks or social relationships with other people who share similar personal or career content, interests, activities, backgrounds or real-life connections.
Social media are interactive technologies that facilitate the creation and sharing of information, ideas, interests, and other forms of expression through virtual communities and networks.
The sociology of the Internet involves the application of sociological theory and method to the Internet as a source of information and communication. The overlapping field of digital sociology focuses on understanding the use of digital media as part of everyday life, and how these various technologies contribute to patterns of human behavior, social relationships, and concepts of the self. Sociologists are concerned with the social implications of the technology; new social networks, virtual communities and ways of interaction that have arisen, as well as issues related to cyber crime.