Public speaking practice is essential for candidates in articulating their viewpoints during UPSC interviews as it hones their ability to communicate effectively and confidently. By engaging in speech exercises, aspirants can improve clarity, diction, and pacing, essential for making a strong impression. Additionally, public speaking enhances critical thinking skills by encouraging candidates to structure their arguments coherently. Practicing in front of peers or mentors provides valuable feedback, helping them refine their messages and reduce nervousness. Overall, this skill ensures that candidates convey their ideas convincingly during high-pressure interview situations.