Football referees, commonly referred to as 'ZEBRAS' due to their black and white striped uniforms, are responsible for officiating football games. They are responsible for enforcing the rules of the game, making sure that all players abide by the rules, and making decisions on penalties and fouls. They also have the authority to stop or suspend a game if necessary. Football referees must have a thorough knowledge of the rules of the game and must be able to make quick decisions in order to ensure the safety of all players.