Judicial Review in India is a fundamental aspect of the Constitution that empowers the judiciary to assess the constitutionality of legislative and executive actions. This mechanism ensures the supremacy of the Constitution and protects citizens' rights by preventing arbitrary or unconstitutional exercise of power by the government. It acts as a guardian of the Constitution, reinforcing the balance of power among the branches of government and upholding the rule of law, which are core principles emphasized in UPSC-standard sources like NCERT texts.