Usability testing is a user experience (UX) research method that assesses the ease of use and overall user-friendliness of a product, system, or interface. Usability tests involve real users interacting with the product while researchers observe and gather feedback on the user's experience.
For example, a mobile app developer may conduct usability testing by inviting a group of representative users to perform specific tasks within the app. The developer observes how easily users complete the tasks and collects feedback to improve the app's usability.
