High Courts are the highest courts in a state or territory, serving as appellate courts that review decisions made by lower courts. They play a crucial role in upholding the law and ensuring justice, often dealing with significant legal issues and constitutional matters. Each High Court has jurisdiction over its respective region and can hear cases involving civil and criminal law. In many countries, such as India and Australia, High Courts also have the power to interpret the constitution and protect fundamental rights. They serve as a vital check on the legislative and executive branches of government, ensuring that laws align with constitutional principles.