Websites such as Delicious, Digg, Slashdot, diigo, stumbleupon and Reddit are popular social bookmarking sites used in social media promotion. Each of these sites is dedicated to the collection, curation, and organization of links to other websites. This process is crowdsourced, allowing members to sort and prioritize links by relevance and general category. Due to the large user bases of these websites, any link from one of them to another, smaller website usually results in a flash crowd. In addition to user generated promotion, these sites also offer advertisements within individual user communities and categories. Because ads can be placed in designated communities with a very specific target audience and demographic, they have far greater potential for traffic generation than ads selected simply through cookie and browser history. Additionally, some of these websites have also implemented measures to make ads more relevant to users by allowing users to vote on which ones will be shown on pages they frequent. The ability to redirect large volumes of web traffic and target specific, relevant audiences makes social bookmarking sites a valuable asset for social media marketers.
