What are key benefits by Social Book marking ?

[senthil]

What are key benefits by Social Book marking ?

[seojyoti]

Social bookmarking is helpful to get traffic to your website and it also good for online presence. Provide link juice also to your internal pages. We can interact or easily access any website with the help of social bookmarking.

[Fli]

Social bookmarking is helpful to ... Provide link juice.
I remember some bookmarking sites created nofollow attribute links which does not carry link juice which means no positive SEO/ranking impact on the site i think.

[cracker]

Social bookmarking site is very useful to get back links