User Experience (UX) refers to the overall quality of a person's interactions with a product, service, or system. It encompasses all aspects of the end-user's engagement, including usability, accessibility, efficiency, and satisfaction. Good UX design aims to create intuitive, seamless, and enjoyable experiences by understanding users' needs, behaviors, and pain points. This process often involves research, prototyping, testing, and continuous improvement to ensure that the final product not only meets but exceeds user expectations.