Understanding the Indian Constitution is vital for UPSC preparation, as it lays the foundation for the country's governance and legal system. Knowledge of constitutional provisions, fundamental rights, and duties is crucial for both the Preliminary and Mains examinations. Candidates must be aware of landmark judgments, amendments, and the roles of various institutions to effectively navigate questions related to governance and law. This foundational knowledge also aids candidates in developing effective administrative and ethical perspectives, preparing them for their role as future civil servants.