Feedback and evaluation are crucial in UPSC preparation as they provide candidates with insights into their performance and areas needing improvement. Regular assessments help identify strength and weaknesses, enabling learners to focus on strategic study. Constructive feedback from mentors or peers fosters an environment of learning and adaptation, facilitating a more efficient preparation process. Continuous evaluation through tests and quizzes can also simulate real exam conditions, enhancing time management and stress management skills essential for the actual exam.