A more thorough explanation:

Definition: Trial courts are courts that hear a case for the first time. They are also known as courts of original jurisdiction. A trial court makes decisions based on both facts and laws presented during a full trial. The decisions made by a trial court can be appealed to a higher court for review. In contrast, an appellate court only reviews the decisions made by the trial court and is limited to certain issues.

Both the federal and state governments have designated trial courts. A trial court of general jurisdiction can hear any civil or criminal case that is not already exclusively within the jurisdiction of another court. Examples of trial courts of general jurisdiction include the United States district courts on the federal level and state-level trial courts such as the New York Supreme Courts and the California Superior Courts. A trial court of limited jurisdiction can only hear specific kinds of cases based on subject matter, amount in controversy, statutory grant, or administrative matters.

Examples:

• A person is charged with a crime and their case is heard in a trial court. The trial court hears evidence from both the prosecution and defense and makes a decision based on the facts and laws presented.
• A couple is getting a divorce and their case is heard in a trial court. The trial court hears evidence from both parties and makes a decision on how to divide their assets and determine child custody.

These examples illustrate how trial courts are responsible for hearing cases for the first time and making decisions based on the evidence presented. The decisions made by the trial court can be appealed to a higher court for review.