Mock tests play a critical role in UPSC preparation by simulating the actual examination environment. They help aspirants assess their knowledge and identify areas requiring improvement. Regularly taking mock tests enhances time management skills, as candidates practice answering within confined time limits. Additionally, feedback from these tests provides insight into answer writing styles and helps refine strategies for the Mains examination. Mock tests also bolster candidates' confidence and reduce exam-related anxiety by familiarizing them with the test format. Overall, they are an invaluable component of a comprehensive UPSC preparation plan.