This document discusses the importance of usability in websites. It notes that over 83% of users will leave a website if it takes too many clicks to find what they are looking for, and $25 billion is lost every year due to usability issues. The document then examines existing tools to evaluate website usability, including tools that obtain feedback from experts, track real user behavior and actions, and check for compliance with usability guidelines. It also references a Netcraft report finding that only 29.3% of existing websites are currently active, suggesting that websites need to be usable or users will stop using them.