The significance of international relations for UPSC Mains preparation lies in its role as a key subject that connects various topics in the syllabus, enhancing a candidate's understanding of geopolitics, diplomacy, and global issues. Being well-versed in international relations helps candidates articulate their answers effectively and demonstrates an awareness of current affairs, enriching their essays and interview responses. Moreover, a strong grasp of global dynamics allows candidates to analyze India’s position on the international stage, which is often reflected in questions. Thus, it is integral to scoring well in the Mains examination.