Compared with the executive and legislative branches the main purpose of the judicial branch is "to interpret laws".
The judicial branch of the government interprets laws. At the point when cases are conveyed to the Supreme Court (or some other lower common court in the United States), it is the Court's (judiciary's) occupation to decipher the applicable law for the situation. The Court may choose that the law is by and large unjustifiably executed or that the law was unlawful in the first place. Whatever the Court chooses, this turns into the point of reference for how the law must be translated. Since the Supreme Court is the most elevated court in the land, it can decide how laws must be translated for the whole country.