The understanding of demographic changes is significant for UPSC candidates as it informs policy-making and project implementation. Awareness of trends such as population growth, aging, and urbanization allows candidates to analyze their societal impacts and propose effective solutions. These changes influence various sectors including healthcare, education, and employment, thus candidates must grasp their implications for governance. Preparing for demographic-related questions enables candidates to discuss broader socio-economic contexts, which is essential for both the UPSC examination and future civil service roles.