This document provides an introduction to social networking. It defines networks as interconnected groups of people or things that can also refer to interacting with others to gain connections. Common types of networks include media, business, computer, and personal social networks. Social networks online allow people to create profiles and invite others to join their network, growing the total membership. Popular social networking sites mentioned are MySpace, Facebook, and Twitter. The document also discusses how social networks can be used for education, both for educators to collaborate and students to learn, but there are also concerns about inappropriate content and privacy.