A usability test is a way to evaluate how easy it is for a user to interact with a product, such as a website, app, or software. Generally, a usability test involves determining a problem to be addressed and designing a test plan to measure the effectiveness of the user's experience. This can be done through interviews, questionnaires, remote moderated or unmoderated tests, A/B testing, and more. The goal is to uncover potential issues or areas of improvement as well as measure task completion time and user confidence. After the test has been conducted, the results can be analyzed to gain insights and inform product design decisions.