Long tail

In statistics and business, a long tail of some distributions of numbers is the portion of the distribution having many occurrences far from the


In statistics and business, a long tail of some distributions of numbers is the portion of the distribution having many occurrences far from the "head" or central part of the distribution. The distribution could involve popularities, random numbers of occurrences of events with various probabilities, etc. The term is often used loosely, with no definition or arbitrary definition, but precise definitions are possible.
Read article on Wikipedia