There are lots of great social network sites today but among them I think the best are Facebook, Twitter and StumbleUpon. They are useful for making a brand name online.
Currently Facebook, Twitter, Linkedin are extremely popular networks.. You can also keep an eye on Xing, plaxo too
In the Social Networks, It's a lot of useful websites available that you can promote your website as well as you build up your networks.
Facebook is where the money is. But seems like they hire 1 person that sites and just watches 1 account all day. Harder and harder to get anything done on there.
Well I think I might have a slightly different taste As per my opinion and experience these are the networking sites I like the most : Facebook, Hacker News, Reddit, Digg, Youtube, LinkedIn, Stumbleupon, Diggo, Delicious and Mister Wong
Facebook is the best social network till now because of privacy. After facebook i like linkedin and twitter.
Correction. It's "What" not "Who". Ok. To answer your question, I think it's pretty obvious that Facebook is the best among social networks since it has lots of registered members.
facebook is nice but they really need many functions like when you post on wall then there must be edit button or link to edit the post. Many features are missing on facebook.
Youtube, twitter and facebook are currently the best social networking sites. Between those, I would look at youtube first and then facebook. Google has a financial interest in making sure that youtube videos rank well. Because of that, your video marketing efforts will probably pay off sooner then facebook.
It's either facebook or twitter but for me it's facebook because most of all people in the world have an account on it.