Online business optimization software publisher Omniture Inc. revealed Wednesday that Magazines.com is using an Omniture application to improve the performance and popularity of its Web site. Financial impact of the win was not disclosed. Omniture said that Magazines.com is using its Test&Target utility to improve its web pages. Omniture's Test&Target utility is used by web sites to conduct A/B testing of web page layouts. Headquartered in Franklin, Tenn., Magazines.com is a magazine subscription service. The privately held company's investors include Anderson Media and Time Inc.