**What is Social Networking?**
"A social network service focuses on the building and verifying of online social networks for communities of people who share interests and activities, or who are interested in exploring the interests and activities of others, and which necessitates the use of software. Most social network services are primarily web based and provide a collection of various ways for users to interact, such as chat, messaging, email, video, voice chat, file sharing, blogging, discussion groups, and so on." As you can see, a social network is actually a collection of Web-based tools." Source: Wikipedia

Social Bookmarking in Plain English

Examples of Social Networks
Ning is a free service that actually lets you create your own social network.

The Best Social Networks for Students
MySpace is dead. Long Live Ning!
How to Help Your Kids use Social Networking Web Sites More Safely