Appeal courts, also known as appellate courts, are higher-level courts that review decisions made by lower courts, such as trial courts. Their primary function is to determine whether legal errors occurred during the original trial that could have affected the outcome. They do not conduct new trials or hear new evidence; instead, they focus on the application of the law and the procedures followed in the initial case. In an appeal, parties involved, known as appellants and appellees, present their arguments through written briefs and sometimes oral arguments. The appeal court then issues a ruling, which can affirm, reverse, or modify the lower court's decision. This process helps ensure fairness and consistency in the legal system, contributing to the overall integrity of the judiciary.