Federal judges hold critical roles, including interpreting the law, resolving disputes, and ensuring justice. They are responsible for upholding the Constitution and applying federal statutes in cases that come before them. Judges also ensure a fair trial, protecting the rights of defendants and maintaining court integrity. In addition, they often play a role in shaping legal precedents through their rulings, which can influence future cases. Their decisions may also have broader societal implications, impacting public policy and rights issues within the judicial context.