Social Bookmarking is similar to bookmarking websites on your personal computer, but it is visible to anyone. The more people that bookmark the same website, the more votes that website receives and the more popular it becomes. Many times your content can go viral, if it receives enough votes and is promoted to the front page. Social bookmarking should be an essential part of your link building strategy. Just make sure the social bookmarking site you are submitting your content to, does not place a “no follow tag” on your bookmarked links. When the social bookmarks are “followed links”, they will count as a back link to your content and help your content get indexed frequently and even help you rank organically in the search engines. There are many social bookmarking sites available such as DIGG, Delicious, Yahoo Buzz and Stumbleupon. Make sure the site that you submit your content to receives a decent amount of traffic, has active users and, once again, will follow your links.