What are Tags?
A tag acts like a subject or category. A keyword is used to organize photos, webpages, and objects on the Internet. Each user "tags" a profile or image using his/her own unique tag. An image or profile may have multiple tags that identify it. Profiles and photos with identical tags are then linked together and users may use the tag to search for similar profiles, people, and activities.
Uses
Tags can be used to specify properties of an object that are not obvious to the object itself. Tags can be used to find objects with similar properties or to organize objects. Tags are often used in social software and Web 2.0 pages. The method of allowing open categorization of the Internet is often referred to as Folksonomy.
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