An ordering of advertisements requested by an ad consumer is based on scores generated for the ads. In each case, a score may be a function of at least one performance parameter associated with the ad. The ad consumer may generate presentation information (e.g., a Web page) including advertisements and non-advertisement content (e.g., search results) by (i) accepting the non-advertisement content and advertisements, each of the advertisements including a score, and (ii) combining the non-advertisement content and the advertisements such that relative placements of the advertisements are based on their associated scores.