Folksonomy

Folksonomies, whose social nature is reflected in the inclusion of the word 'folk' in their name, are a classic web 2.0 tool. They depend on, and represent, the collective intelligence which can be generated online. Common folksonomy web services are also available in app versions which can be used on mobile devices
    Folksonomies are user-generated indexes of online materials. After setting up an account with a folksonomy (or social bookmarking) service such as Delicious or Diigo, users are prompted to download a tagging button to their browser bar. Using this button, they can add items to their index by 'tagging' them, that is, adding a descriptive term or terms. The most common display form of folksonomies is the tag cloud. The more often a particular tag has been used, the larger and darker the font. An extract from a Delicious tag cloud, formerly found on this wiki, can be seen on the left; it has recently been replaced by a Diigo tag cloud on the E-learning tag cloud page of this wiki. Clicking on any tag will take you to a list of all of the materials which have been tagged with that particular term. An extract from another Diigo tag cloud, originally from the Electric Shepherds blog, is shown below right.