Communication skills have a profound impact on the UPSC interview performance as they enable candidates to articulate their thoughts clearly and effectively. Strong verbal communication enhances candidates' ability to convey ideas succinctly, reflecting confidence and poise. Active listening is also crucial, allowing candidates to respond thoughtfully to questions. Additionally, non-verbal cues such as body language and eye contact can influence interviewers' perceptions. Practicing mock interviews can help aspirants refine their communication skills, ensuring they can present themselves effectively while engaging in meaningful dialogues with the panel during the actual interview.