1. A computer-implemented method, comprising: receiving sets of duplicate keywords for an advertising account, each set of duplicate keywords including keywords having common matching text for the set, each of the duplicate keywords corresponding to an advertisement for the advertising account; presenting, by a data processing device, a duplicate keyword interface in which the sets of duplicate keywords are displayed, the duplicate keyword interface including a duplicate keyword selection interface for requesting selection of keywords from the sets of duplicate keywords based on a selection criterion; receiving, by the data processing device and through the duplicate keyword interface, a keyword selection criterion for selecting duplicate keywords; identifying, by the data processing device and based on the received keyword selection criterion, at least two different sets of duplicate keywords that each include a duplicate keyword that satisfies the selection criterion; receiving a single action request to modify an attribute value of duplicate keywords in the at least two different sets of duplicate keywords that satisfy the selection criterion; and modifying, within each particular set of the at least two different sets of duplicate keywords, the attribute value for a proper subset of the duplicate keywords in the particular set, the proper subset being only those duplicate keywords in the particular set that satisfy the selection criterion, the modification being performed in response to the single action request.