1. Social networks allow individuals and organizations to connect through shared interests and activities. Popular social networks include MySpace, Facebook, and Twitter. 2. MySpace was originally intended to allow for creative self-expression through visual and audio content. Facebook focuses more on real identities and self-promotion to established friends. 3. Younger generations have used Facebook more frequently than MySpace as it allows easy contact with friends and helps find connections from the past. Twitter is growing in popularity for sharing information publicly compared to Facebook's private friend networks.