What is one important function of the supreme court in the U.S. federal government?

Answer:the one important function to the Supreme Court in the United States federal government is the following: The supreme court is ultimate judge in all matters concerning laws of congress, and the important law of all- the Constitution.
Answer:
it ensures that all Americans receive a fair trial by accepting all submitted cases.
Explanation:
The important function of the supreme court in the U.S. federal government is to ensure equal justice under law. The supreme court is the highest tribunal court for all cases arising under constitution of the united states. It ensures the America people are given equal justice under law in a fair trial.