Tagging may broadly refer to book marking, identifying images, or even a text through information on the net. Widely used in blogging sites and other descriptive formats, a tag serves the purpose of a keyword. This means the information that is specified with keywords becomes a reference point for the viewer to search for other words of information. The tag normally appears as a web link. Types of tags vary in style such as triple tags and hash tags. Tags when collected together form a tag cloud and if there is a set of tag clouds, then it is referred to as folksonomy.

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