- Image via CrunchBase
This form of tagging has the rather clumsy name of a folksonomy.
AFolksonomy is a system of classification derived from the practice and method of collaboratively creating and managing tags to annotate and categorize content; this practice is also known ascollaborative tagging,social classification,social indexing, andsocial tagging. Source: Wikipedia
These folksonomies give us a picture of the collective view, a summary of the zeitgeist, an understanding of the popular interpretation of meaning. There is personal meaning, and shared meaning. By looking at a tag such ashappiness on flickr you can explore the collective meaning of the word and associated tags clustered around it.