In your opinion, which social media site is the best for marketing?

Definitely use facebook and twitter as a minimum...

 

All of the sites mentioned in this forum are the best social media sites to have a huge traffic to your site. Here some guide regarding on why these sites are better to submit: http://justcreativedesign.com/2008/03/12/what-is-the-best-social-media-marketing-website/

 

I've received the most traffic from Reddit, Stumbleupon, Facebook, Twitter and Digg in that order.

I suspect the Facebook and Twitter will get me more hits once more people join my group/follow me, but I'm steadily building on that at the moment.

Also, it's based on different content too - I find that the more funny/geekier stuff does better at Reddit, but my web design and development tips generally get retweeted more.