Trial courts are the first level of the judicial system where cases are heard and decided. They handle a variety of cases, including civil disputes and criminal prosecutions, allowing for the presentation of evidence and witness testimonies. The decisions made in trial courts can be appealed to higher courts, which review the legal aspects of the case. In the United States, trial courts are often referred to as District Courts or Circuit Courts, depending on the jurisdiction. These courts play a crucial role in ensuring justice by providing a platform for resolving conflicts and upholding the rule of law.