The main role of a UX designer is to enhance user satisfaction by improving the usability, accessibility, and interaction quality of a product. UX designers conduct user research to understand user needs, create wireframes and prototypes, and perform usability testing. Their goal is to design intuitive and enjoyable experiences that align with user expectations and business objectives. By effectively combining design principles with user insights, UX designers help ensure that a product is not only functional but also engaging and user-friendly.