8. The system of claim 7 , comprising determining a weight for each n-gram based on a number of times links to the given web page are selected when the n-gram is included in the at least one search query that was used to present a search results page that includes the links to the given web page.
8. The system of claim 7 , comprising determining a weight for each n-gram based on a number of times links to the given web page are selected when the n-gram is included in the at least one search query that was used to present a search results page that includes the links to the given web page. 9. The system of claim 8 , wherein determining the weight comprises determining the weight for each n-gram based, at least in part, on a number of conversions that occur after selections of the link for the given web page.