3. The model of claim 2 , the probability formulated as: 
 Pr(Information Value|E 1 ,E 2 , . . . E J ); wherein Pr is the probability, Information Value relates to an importance of the site and topic to the user given evidence E relating to attributes of information importance, and J being an integer.
3. The model of claim 2 , the probability formulated as: 
 Pr(Information Value|E 1 ,E 2 , . . . E J ); wherein Pr is the probability, Information Value relates to an importance of the site and topic to the user given evidence E relating to attributes of information importance, and J being an integer. 4. The model of claim 3 , the evidence including at least one of web pages visited, how much time users spend observing the web pages, how many links the user followed from the web pages, higher-level topic of the web pages viewed, interactivity with the web pages and a consideration of navigation efforts of a user.