7. The method of claim 1 wherein the step of building a lexical index of the one or more queries and data associated with the one or more queries includes: retrieving query data for a given advertiser; selecting a query from the query data; separating the query into a set of constituent tokens; updating an entry in a data structure using a first constituent token of said set of constituent tokens; and chaining queries that contains said first constituent token of said set of constituent tokens.
9. The method of claim 7 wherein the constituent token includes a query term.