On the World Wide Web, personalization (or personalisation) means changing web pages based on the interests of an individual. Personalization implies that the changes are based on implicit data, such as items purchased or pages viewed. The term "customization" often is used instead when the site only uses explicit data such as ratings or preferences. Graphic representation of the world wide web around Wikipedia The World Wide Web (WWW, or simply Web) is an information space in which the items of interest, referred to as resources, are identified by global identifiers called Uniform Resource Identifiers (URI). ...
There are two categories of personalizations: 1) rule-based 2) content-based
Collaborative filtering is the method of making automatic predictions (filtering) about the interests of a user by collecting taste information from many users (collaborating). ... Recommendation systems are programs which attempt to predict items (movies, music, books, news, Web pages) that a user may be interested in, given some information about the users profile. ...