Courts of Appeals are intermediate appellate courts in the judicial system that review decisions made by lower courts, such as trial courts. Their primary function is to determine whether legal errors occurred during the trial that could have affected the outcome of the case. These courts do not conduct new trials or hear new evidence; instead, they focus on the application of the law. Typically, cases in the Courts of Appeals are decided by a panel of judges who examine written briefs and may hear oral arguments from both parties. The decisions made by these courts can set important legal precedents and can be appealed to the Supreme Court in some instances.