Acxiom Digital (formerly Digital Impact) leaves a big impression on Web surfers. As a business segment of data and software provider Acxiom Corporation, the company provides the tools and services that clients need to create and manage online marketing campaigns using e-mail, search engines, targeted Web sites, and banner ads. It offers consulting, media buying, campaign management, and hosting of its IMPACT direct marketing application. IMPACT has helped such clients as Marriott, Gap, and Hewlett-Packard to plan, manage, and analyze their own campaigns.