The Supreme Court of India is termed the custodian of the Constitution as it holds the ultimate authority to interpret the Constitution and ensure that all laws and actions of the government comply with constitutional provisions. This role is pivotal in protecting fundamental rights and upholding the rule of law, thereby reinforcing the democratic framework of governance. Through the power of judicial review, the Supreme Court can invalidate laws or executive actions that contravene constitutional principles, thus safeguarding the rights of citizens and maintaining the sanctity of the Constitution itself.