Write in a legal terminology. A judge's duties include supervising the trial, rendering decisions on legal matters, and guaranteeing that the proceedings are just and compliant with the law. The courtroom's legal expert is the judge. Their duty is to guarantee that the trial is carried out in a way that complies with the law and is impartial and fair. This entails making decisions on legal matters that come up during the trial, like the admissibility of evidence, and educating the jury on pertinent laws that are important to the case. Should the defendant be found guilty, the court also decides on the suitable penalty