What is the purpose bookmarkers? like youtube, myspace, and facebook as well as the like...?

Question

Are they design to promote freedom of expression, speech, advertisment, i.e outside of who they say they are respectfully.

Answer 1

They're social networking sites. Their purpose is to connect people from all over the world. Yet, for all intents and purposes, the more time one spends on such sites (Yahoo answers included!) the less time they spend with actual people, thus becoming more isolated.