Which one is better for traffic

Social bookmarking is better one i suppose.

Social media marketing is the best I can say. But social book marketing is also good in generating traffic.

Depends on the kind of the website, but, definetely social networks are better, because there is more traffic there and people will share it with people with the same interests, but if it's entertaining content it could get more traffic from bookmarks. Both have to be used, and don't forget that social bookmarks are kind of social network too.

Social bookmarking is better one i suppose.

I also think social bookmarking is the best way to bring traffic to your webpage

Well it depends on several factors actually but both typically reaches out to the same audience, the Social Media or those web savvy people involved in several Social sites. Though in effectiveness, it varies on your content since typically the Social Networking sites are a faster way for a content to be "shared" and passed from one person to another.

If it wouldn't hurt, I suggest both for optimal effect!

I think both are same level . Because Social networking can be a fun way to raise awareness, not only it is an organic method of seo it is also inexpensive and can build lasting relationships. Using this type of networking does require patience and persistence though; individuals should keep their status updated at all times.

For me, It is both..Social Media can really drive traffic to your site if used properly and if you can maximize it's used..

hmm , for me it is social networking , this is easier than another way !