submitted and tagged, the better chance it has of being found. Spammers have started bookmarking the same web page multiple times and/or tagging each page of their web site using a lot of popular tags, obligating developers to constantly adjust their security system to overcome abuses. Furthermore, since social bookmarking generates backlinks, social bookmark link generating services are used by some webmasters in an attempt to improve their websites' rankings in search engine results pages. See also Bookmark manager List of social bookmarking websites Models of collaborative tagging Semantic Web Social media Social networking service Social software Social network aggregation Crowdsourcing References Collaboration Social information processing Crowdsourcing Folksonomy News aggregators Web 2.0