Facebook is the best social networking site promote your website get effective traffi.

Well i used by all three of them but up to my knowledge, Twitter is best
it gives traffic than others.

Any place that helps you get traffic seems to do the job, doesn't it? ;)

LinkedIn also a good social networking site.

HI,

according to me all are good for business. if we know how to work on twitter, facebook or Google+ then we can get more and more traffic from there. it will help to increase our website sales.

Some more social networking sites:
fark.com 7
shutterfly.com/ 7
43things.com/ 7
metafilter.com/ 7
tags.library.upenn.edu/ 7

According to me, Facebook and LinkedIn is best social network sites to me.

Facebook, Twitter, LinkedIn are the best social networking websites.

facebook n twitter

Facebook, Twitter, LinkedIn, digg, stumbleupon, Google+ is the best social networking site.

I used both,but Facebook is more advanced.

Google plus and twitter are best social media sites, with the help of these sites you we can promote our business easily and quickly drive a lot of traffic.

Facebook and twitter ......both are good

For more on business then Twitter.

Facebook, Twitter, Google+ this three social networking site I used. I think this is the best and effective.