The judicial branch is the part of the U.S. government that interprets the law and administers justice.
You know how judging is making a decision? The judicial branch of the U.S. government makes decisions — interpretations — of laws. These laws are created by the legislative branch and carried out by the executive branch. The Supreme Court is the highest authority in the judicial branch, but there are courts and judicial branches on the state and city level too. If you want to become involved with the judicial branch of governement, become a judge or a lawyer.