The Civil Services Aptitude Test (CSAT) is significant in the UPSC examination framework as it assesses candidates' basic numeracy, comprehension, and reasoning abilities. While it's conducted as part of the prelims, candidates must achieve the minimum qualifying marks to proceed to the mains. Although the CSAT is qualifying in nature, its marks do not contribute to the final score. Candidates often find it challenging, especially if they are weak in mathematical or reasoning skills. Thus, preparation for CSAT requires dedicated practice, as it plays a crucial role in enabling candidates to move forward in the selection process.