Doing & Learning SEO and have confusion about social bookmarking. Please explain how effective social bookmarking is in SEO and how to use it. As per my understanding I join some social bookmarking sites and sharing my link there but still confuse how it is beneficial for me?
1- Is it effective in SEO?
2- If yes, How effective should I use it?
3- Should I share only main site link or web 2.0, PDF Submission, Video submission links too?