The technology that focuses on improving user experience through interface design is called User Experience (UX) design. UX design encompasses various disciplines, including user research, interaction design, visual design, and usability testing, to create intuitive, accessible, and engaging designs for users. By understanding user needs and behaviors, UX designers craft interfaces that enhance satisfaction and make products more effective and enjoyable to use. Effective UX design ultimately drives user engagement and retention, contributing to the success of digital products.