Self-assessment plays a vital role in UPSC preparation success as it encourages candidates to evaluate their understanding and progress regularly. By reflecting on their strengths and weaknesses, aspirants can identify areas for improvement and adjust their study strategies accordingly. Self-assessment fosters a sense of accountability and empowers candidates to take ownership of their learning. Furthermore, it aids in building confidence and ensuring a thorough grasp of the vast syllabus, ultimately enhancing performance in both the preliminary and main examinations.