Definitly Facebook with all the "Local advertizing" campaign

Facebook & Twitter work perfect for me! :)

You can get nice traffic by effective promotion on Facebook,Pinterest, Twitter,StumbleUpon,G+ and many more.

Facebook, Twitter, Google+, Stumble Upon and many more

It depend on your target audience, all social media sites such as Twitter, LinkedIn, Facebook, G+ are the best for effective marketing.

Social Media Optimization
 

Facebook, twitter, myspace.com, plus.google, linkedin, stumbleupon, pinterest, delicious, scoop, friendfeed, plurk

My Opinion:

I like pinterest and Google+. Anyone can get a huge amount of traffic within small period of time. But work on them wisely.

Facebook, Google Plus and Twitter are the best social network to get good traffic, But hoe we can can get traffic i want to know

there are many more...here is some of them:
Facebook,Twitter,LinkedIn, Pinterest,G+

Best social marketing site for increase to my website Facebook,google plus,printers.

Depends whether you want to pay for it. Facebook is generally very good, so is Google+. I recommend trying a few Facebook ads.

It mostly depends on a specific niche you're into, but I believe, regardless, that Facebook is still the best for all niches.

I highly recommend twitter because its one of the most interactive social media platforms .Though blogs still remain the best.

Some of the best social networking sites which gives you good traffic are Facebook, Twitter, Google+, Pinterest, StumbleUpon, and LinkedIn

i think gogle+