This document discusses how user testing can improve websites. It describes three ways to test a site: 1) test two nearly identical pages to see which performs better; 2) define a specific goal for the test; and 3) have users complete tasks while observing their actions. User testing involves setting up a scenario for testers, specifying requirements for testers, assigning tasks for them to complete, and then analyzing the results. The document promotes the user testing service UserTesting.com, which allows users to complete tests for $49-$39 each and provides video recordings of users' screens and comments.