A method and system for trafficking one-to-one display ad campaigns centers around a Dynamic Ad Server that generates an advertising creative experience dynamically by assembling different ad subcomponents on the fly, selecting subcomponents based on publisher, user or media parameters submitted to the Ad Server at the time an ad impression is to be served. A business rules engine allows a marketer to author natural-language business rules. Using such system, campaigns can be designed and implemented wherein association of placements to creative tags is only per-size per-campaign, necessitating set-up of only one placement per distinct site in a media plan. By accommodating the rules via dynamic ad placement, a marketer's intent may be fully satisfied. Time required for set-up and launch is dramatically reduced and maintenance and optimization is infinitely scalable.