Online testing is an underused technology solution in the burgeoning field of Web site optimization. Numerous methodologies and testing disciplines exist, each with evidence of success in improved Web site usability, increased relevance, and elevated revenue. Forrester surveyed 250 Web site decision-makers to determine current levels of adoption as well as the barriers and benefits of online testing. This report uncovers our findings, untangles a confusing vendor market, and helps customer intelligence professionals use testing to improve their online initiatives.