Public speaking courses enhance preparedness for UPSC interviews by developing essential communication skills and instilling confidence in candidates. These courses focus on articulating thoughts clearly, maintaining eye contact, and using appropriate body language, all vital for effective interaction with interviewers. Role-playing interview scenarios allows candidates to practice responses in a controlled environment, receiving constructive feedback on their delivery. Furthermore, public speaking training helps reduce anxiety by familiarizing candidates with the act of speaking in front of an audience, thereby relieving pressure during the actual interview.