Abstract: One variation of the method includes: accessing an ad template, designated for presentation within a target webpage, including by a set of ad elements; accessing a set of style rules; accessing a set of style elements for the target webpage; generating a prompt to generate a set of ads by assembling the set of ad elements and the set of style elements and satisfying the set of style rules; receiving the set of ads; for each ad in the set of ads, calculating a style score representing adherence of the ad to the set of style rules; selecting a subset of ads from the set of ads in response to the subset of ads exhibiting style scores exceeding a threshold style; and, in response to selection of a first ad, in the subset of ads, queuing the first ad for insertion into a media player on the target webpage.