Feedback plays a crucial role in preparing for the UPSC interview by providing candidates with external perspectives on their strengths and areas for improvement. It helps in refining interpersonal skills, articulation, and the ability to present informed opinions on various topics. Regularly seeking feedback from peers, mentors, or through mock interviews allows candidates to adjust their preparation strategies effectively. Constructive criticism can highlight aspects like confidence levels and response structure, enhancing candidates' overall readiness. Embracing and acting upon feedback fosters growth and improvement, essential for success in high-stakes environments like civil services interviews.