24. The non-transitory computer storage medium of claim 20 , wherein the query suggestions are ranked further based on a commercial value score for each query suggestion, the commercial value score each query suggestion being based on at least one of a number of advertisements available for the query suggestion and performance of advertisements for the query suggestion.
25. The non-transitory computer storage medium of claim 24 , wherein the commercial value score for a given query suggestion of the query suggestions is further based on at least one of a number of advertisements available for query suggestions that reference a same topic as the given query suggestion and performance of advertisements for the query suggestions that reference a same topic as the given query suggestion.