Social networking and social bookmarking both are very important. But social bookmarking is so effective to increase Backlinks and few visitors while Social networking like facebook, twitter are useful to bring high and quality traffic to your website. So social bookmarking is better than social networking.

Both have their own importance we don't neglect any one Social bookmarking good for increasing traffic on website and Socail networking good for promoting website on Internet

Both are equally important when it is website traffic is consider.

I would choose both. Social Networking are most useful for traffic and social bookmarking site are useful for traffic and ranking purpose.

Social networking and social bookmarking both are important for seo.

social bookmarking useful for keyword position in SE.. social networking helps to generate more traffic and keyword positions..

both social networking and social booking both have equal importance

In my point of view Social Bookmarking or Social networking Both are most importent role play in Seo. they more help to good rank and get more traffic on your website.

A social bookmarking service is a centralized online service which enables users to add, annotate, edit, and share bookmarks of web documents. Many online bookmark management services have launched since 1996; Delicious, founded in 2003, popularized the terms "social bookmarking" and "tagging".