Familiarity with the syllabus is critical for systematic UPSC preparation as it provides a clear roadmap for study. Understanding the scope and structure helps candidates prioritize topics based on their weightage and relevance in exams. This clarity allows for more efficient time management, enabling aspirants to allocate appropriate study hours to various subjects. A well-structured approach also aids in breaking down complex topics, making them more manageable. Overall, knowing the syllabus fosters a focused and organized preparation strategy, ultimately improving performance in both prelims and mains.