Usability testing is a process that involves testing a product with real users to observe and note their interactions while they complete a list of tasks. The main objective is to determine whether the design is intuitive and usable enough for users to achieve their goals. However, the benefits of usability testing go beyond functionality and usability. It also helps to understand the use cases of the product, the target audience, and build a better product. In the context of human-centered design, usability testing is a key principle for developing user-centric products. The modern approach to usability testing started in the ’80s with the development of personal and work computers. Today, usability testing falls under three broad categories: qualitative or quantitative, moderated or unmoderated, and remote or in-person. The choice of method depends on the research goals and the product being tested. Overall, usability testing helps to understand the user's perspective and optimize the product for their needs.