facebook is the best

1) Facebook
2) Twitter
3) Google +
4) Linked In
These 4 are best .... particularly Google + Now a Day ...

For me Google + is one of the best sites for me... i just love Google + ....

facebook is the best from all others.

of course it facebook
No one other site have largest user as FB have.
FB is the only site using by large of user every second. For example I'm a user of FB and using it daily for 16 to 20 hours.
:)

I think all three are the best sites. because social networking sites help to improve business. google also help to increase traffic on your website if your website rank is higher on google.

I have not tried much with social sites yet, so I kind of gave up on them a while ago.

I like Facebook

hello guys
the best social sites is facebook , twitter ,blog , Google+.
facebook is the only site which is most popular in almost every field and also useful.

I think Facebook, Twitter, Digg and Google plus are best social networking sites.

Well, It seems Digg is not favorable in google eyes after the Google Penguin update. sorry.

Pinterest, Facebook, Twitter, digg, Tagza are the most useful websites .

I'm 20 hour onliner on Facebook...
:)

In my opinion Facebook & Twitter are the best sites to boost your business.

Facebook is best for marketing ,communicating .A best and most visited social network .Facebook allows us to create business pages and communities.