The primary goal of a user interface (UI) designer is to create an intuitive and engaging interaction experience for users of a product or application. This involves designing layouts, visual elements, and interactive components that are not only aesthetically pleasing but also functional. UI designers focus on usability, ensuring that users can navigate the interface seamlessly and accomplish their tasks efficiently. They consider user feedback and conduct usability testing to refine their designs continuously. Ultimately, the aim is to enhance user satisfaction and increase the likelihood of users returning to the product.