International relations play a significant role in the UPSC syllabus, as they encompass issues related to global diplomacy, security, and international policy-making. Understanding these dynamics is critical for candidates, as they reflect on India's position in the world and its interactions with different nations. Topics like trade agreements, foreign policy, and international organizations are pivotal. This knowledge enables future civil servants to navigate complex global challenges effectively and make informed decisions that align with national interests and global cooperation.