A user interface (UI) is the visual and interactive element of an application or software that allows users to interact with it. UI design is crucial because it directly influences how easily users can navigate the application and perform tasks. A well-designed UI enhances usability and leads to better user satisfaction by providing clear layouts, responsive elements, and intuitive controls. Moreover, effective UI can elevate a brand’s image by creating a cohesive aesthetic. In app design, UI plays a pivotal role in engaging users, improving retention, and ensuring smooth interactions.