Writing practice significantly improves performance in UPSC descriptive exams by enhancing candidates' writing skills and thought organization. Regularly practicing writing essays and structured answers helps build a coherent narrative style and articulate ideas clearly. Continuous practice allows candidates to experiment with different topics, thereby increasing familiarity with various subjects covered in the syllabus. Additionally, developing a habit of timed writing enables aspirants to manage their time efficiently during the actual exam. Ultimately, thorough writing practice nurtures both speed and quality, vital for success in the UPSC descriptive sections.