Patent ID: 8112312

Claim:
A network server including a computer readable storage medium, having instructions executable to: serve to network clients from the network server a plurality of webpage advertisements, each advertisement including text representative of an offer, said text having factors and levels, where at least two respective advertisements served to network clients have at least one of a different factor and a different level and wherein the plurality of served advertisements form only a subset of a total number of advertisements covering every, combination of the different factors and levels; receive a set of responses from the clients of the plurality of served webpage advertisements subset; correlate the set of responses to the factors and levels utilizing multivariate testing, wherein the correlating using multivariate testing includes determining an influence of each level and each factor on the set of responses, the correlation based on the served webpage advertisements subset; and serve to network clients from the network server at least an improved webpage advertisement including the offer represented by text having optimized factors and levels, said optimized factors and levels based on the correlation and permitted characteristics of the offer.