An effective study group for UPSC aspirants exhibits certain hallmarks. First, it should consist of committed and disciplined members who value mutual learning. Open communication is essential for sharing knowledge and resources, while constructive feedback helps improve individual performance. Regular meetings should be scheduled to discuss current affairs and conduct mock tests, fostering a competitive yet supportive environment. Additionally, diversity in perspectives can enhance understanding of complex topics, while celebrations of individual and group achievements help maintain motivation and morale throughout the preparation journey.