Firstly, what is social bookmarking?

To be successful on the internet, people, customers, prospects, have to be able to find you. To find you they often use a search engine like Google, Yahoo or Bing to look for the “thing” they are interested in. To be found on the first page of a search engine is vitally important as most people, actually more than 95% of people never look at more than the first 3 pages of results. Some of the popular social bookmarking sites are Digg, Delicious, StumbleUpon, Facebook and Twitter.