Self-assessment plays a vital role in the UPSC preparation journey by allowing candidates to evaluate their strengths and weaknesses. Regular practice through mock tests and self-quizzing enables aspirants to identify areas that require more focus, thereby optimizing their study approach. Receiving feedback on essays or answers helps in recognizing patterns and improving writing skills. Self-assessment fosters accountability and guides aspirants in adjusting their learning strategies, ensuring a more targeted and effective preparation for the exam.