This document discusses the importance of user experience and usability testing in website design. It defines usability as how easy user interfaces are to use, and notes there are five key components: learnability, efficiency, memorability, errors, and satisfaction. Early and frequent user testing is recommended to fix issues, test assumptions, and inform the design process. Examples of tasks and questions to use during testing are provided. The benefits of testing with real users and focusing on important fixes rather than minor issues are also outlined.