Tagging allows people to assign labels to contents using keywords, so that they can share what they find, recall what they’ve looked at before, and discover content that others have labeled.
Tagging can also be prone to spam, and to bad suggestions for tags. A Goodness Measure might be used to offer suggestions for tags, that avoids bad tags and spam in those suggestions, and that looks at:
- The authority of a person tagging,
- The probability that a person tagging an object with one keyword might tag the same object with another keyword that frequently co-occurs with the first one in the tags used by others for that object,
- The probability that any object tagged with with one keyword is tagged with the other keyword, based upon tags used by others.