The United States Courts are the judicial branch of the federal government, responsible for interpreting and applying the law. They operate under the U.S. Constitution and consist of various levels, including District Courts, Courts of Appeals, and the Supreme Court. Each level has specific functions, with the Supreme Court being the highest authority. The courts handle a wide range of cases, including civil, criminal, and constitutional matters. They ensure justice is served and uphold the rights of individuals. The system is designed to provide checks and balances within the government, maintaining the rule of law across the nation.