Appellate advocacy means the legal representation by an attorney before any state or federal appellate court, including state supreme courts and the United States Supreme Court.

Appellate courts do not retry cases or hear new evidence. Instead, appellate courts review what occurred in the trial court to see if the proper procedures were followed and the proper law was applied. An appellate attorney seeks to correct errors of trial court judges and change the law by persuading appellate courts to overturn lower court decisions or to expand or change the interpretation of statutory law.