How are teens being affected by social media? Research suggests the impact is an emotional one. [6:11]

How can your friends -- and your friends' friends -- affect you?

Can other social networks make users unfriend Facebook?

Search engine guru Danny Sullivan discusses how Google Plus compares to other social network titans.

This video is a metaphor-rich explanation of Social Media. It tells a story of a town that changes as a result of democratization.

This video reviews how social media sites like blogs, Twitter and Facebook are changing how companies think about external communication. It includes points on:

This video introduces the basic ideas behind Social Networking. It focuses on the role of social networking in solving real-world problems.

This video teaches the basic ideas behind social networking with sites like Facebook. It tells the story of a woman who discovered how social networking revealed a world that was formerly hidden from view.

In It's Complicated, Internet scholar danah boyd debunks myths about teens' online lives.