The document provides guidance on auditing a website for usability issues. It discusses identifying target audiences and their goals, prioritizing content and navigation to balance goals and usability. Key parts of usability include navigation, content, and forms. Navigation should be clear and intuitive through labels, organization and mobile optimization. Content should be concise, scannable and accessible. Forms require proper fields and error messages. Usability can be tested through user tests, surveys and analytics to ensure the site meets users' needs.