If you think that banner ad is worth a look, Conversant (formerly ValueClick) will put a price on it. The company brings Web publishers together with advertisers, providing the technology necessary for each side to manage online advertising. Its media services segment offers e-mail marketing, search marketing, and ad placement services. The company's affiliate marketing tools track and analyze online marketing programs through its Commission Junction subsidiary, while its Mediaplex unit provides online ad serving and management tools. Pricerunner, Shopping.net, and Smarter.com allow consumers to compare and research products online. Conversant was acquired by Alliance Data Systems in late 2014.