The U.S. Supreme Court is the highest court in the United States, established by the Constitution in 1789. It consists of nine justices who are appointed for life by the President and confirmed by the Senate. The Court's primary role is to interpret the Constitution and review laws to ensure they align with constitutional principles. The Supreme Court hears cases that involve significant legal questions, often related to civil rights, federal laws, and state laws. Its decisions set important precedents that influence the legal system and society as a whole, making it a crucial part of the U.S. government system.