Marks obtained in the UPSC Mains significantly affect the final ranking in the Civil Services. The Mains exam comprises multiple papers, including optional subjects and general studies, and contributes to a substantial portion of the overall evaluation. Higher scores in the Mains not only enhance candidates' chances of selection but can also influence the services allocated to them. Since the final merit list is derived from both Mains and the subsequent interview, excelling in the Mains examination is crucial for aspiring civil servants aiming for prestigious postings.