The Supreme Court of India plays a crucial role in the judiciary, fulfilling key functions that include acting as the Guardian of the Constitution. This involves protecting the Fundamental Rights of citizens, being the final interpreter of the Constitution, hearing appeals from lower courts, and resolving disputes that arise between states or involve the central government. Moreover, the Supreme Court has the authority to declare any law unconstitutional if it conflicts with the Constitution, thereby maintaining its supremacy and ensuring that all legislative actions uphold constitutional values. These functions are significant as they underpin the rule of law and democratic governance in India.