Crucial features of public administration relevant to UPSC include concepts like governance, policy-making, accountability, and transparency. Understanding the roles of various government entities, bureaucratic frameworks, and their functions within a democratic setup is vital. Knowledge of administrative reforms, public service delivery mechanisms, and e-governance is also important. Candidates should be familiar with the principles of administrative law and the Indian Constitution, which underpin public administration in India. Additionally, an awareness of contemporary challenges and innovations in the field can enrich responses and demonstrate a comprehensive understanding.