Usability is a research area that focuses on the effectiveness, efficiency, and satisfaction with which users can accomplish specific tasks in a particular context using a product or system. It involves studying how easily users can interact with a product or system, how intuitive the interface is, and how well the design supports the user in achieving their goals. Usability research often includes tasks such as user testing, heuristic evaluations, and usability studies to identify and address usability issues and improve overall user experience. Overall, the goal of usability research is to create products and systems that are user-friendly, easy to use, and provide a positive user experience.