66. A computer-readable memory device storing instructions executable by at least one processor, the computer-readable memory device comprising: one or more instructions to identify a document that is stored on a server in a network and that includes links to linked documents; one or more instructions to determine scores for a plurality of the links in the identified document; one or more instructions to compare the determined scores to a threshold; one or more instructions to delete one of the plurality of links from the identified document when the determined score for the one of the links falls below the threshold; and one or more instructions to provide, to a user, the identified document without the deleted link.
66. A computer-readable memory device storing instructions executable by at least one processor, the computer-readable memory device comprising: one or more instructions to identify a document that is stored on a server in a network and that includes links to linked documents; one or more instructions to determine scores for a plurality of the links in the identified document; one or more instructions to compare the determined scores to a threshold; one or more instructions to delete one of the plurality of links from the identified document when the determined score for the one of the links falls below the threshold; and one or more instructions to provide, to a user, the identified document without the deleted link. 68. The computer-readable memory device of claim 66 , wherein the one or more instructions to determine the scores include: one or more instructions to determine a clickthrough rate for each of the linked documents, one or more instructions to determine a score for each of the linked documents based on the determined clickthrough rates, and one or more instructions to associate the determined scores for the linked documents with the corresponding links in the identified document.