Social Bookmarking is process of “tagging” any website URL or Link on online social networking websites which further can be shared publicly to group of users or friends. We know that more a web page is submitted and tagged in social sites means the better chance it has of being found and getting traffic. Due to this feature of Social bookmarking, its being used on large scale in SEO link building. Social bookmarking helps in building website trust, visibility, direct traffic as well as helps in keyword rankings.