UI/UX designers are responsible for creating intuitive, visually appealing interfaces that enhance user experience. Key skills include proficiency in design software like Adobe XD or Sketch, knowledge of user-centered design principles, and the ability to conduct user research such as interviews and usability testing. They must possess a keen eye for aesthetics, typography, and color theory, while also understanding the technical aspects of web and app development. Responsibilities include wireframing, prototyping, and iterating designs based on user feedback. Effective communication skills are crucial for collaborating with cross-functional teams, including developers and product managers, to ensure designs meet both user needs and business objectives.