The Civil Services Examination conducted by the Union Public Service Commission (UPSC) in India is a highly competitive and sought-after examination for aspiring civil servants. The exam consists of three stages: the Preliminary Examination (Prelims), the Main Examination (Mains), and the Personality Test (Interview). In this article, we will focus on the key differences between the Prelims and Mains and explore effective preparation approaches for each stage. Additionally, we will discuss the significance of IAS coaching in Delhi and the best UPSC coaching institutes in the city.