A caddie is a professional golf assistant who helps players navigate the course and make strategic decisions during a round of golf. They carry the player's clubs, provide advice on club selection and course management, and help read putts. Caddies often have extensive knowledge of the course and can offer valuable insights that can improve a player's performance. They also help keep the player focused and organized throughout the game. Caddies play an important role in the success of a golfer and are a valuable asset on the course.