In my words, Bookmarking sites helps you to getting instant traffic on your site by his powerful social media factor.You can easily bookmarks this site on your favorites list and when it requires you can click on this and you will get this..
The powerful reign of social bookmarking has ended after Penguin. Now, it only leaves us one option - to engage users in a manner that they will like to visit our site. And that Google wants.
Social bookmarking can still be used. But make sure that they are popular ones.