What is an appeal?
An appeal is when you ask a higher court to review a decision by a judge in a lower court. The higher court (which may be called a court of appeals, appellate court, or supreme court, for example) looks at the "record", which includes the transcript, physical evidence/ documents from the trial court and decides if the judge made any mistakes of law. You cannot introduce new evidence when you appeal your case to a higher court. The higher court only looks at what was said and done in the trial court.
Usually, you only have a short time to file an appeal after the judge issues the order or decision you want to appeal. The time limit may be different depending on what state you live in and/or what type of case you want to appeal. You may want to talk to a lawyer as soon as possible about the time limit in your state so that you do not lose your chance to appeal.