The term 'Broomstick Riders' refers to a group of witches and wizards who use broomsticks as their primary mode of transportation. The term is derived from the popular fantasy novel series, Harry Potter, in which the main characters use broomsticks to fly around the magical world. The acronym WES stands for Wizarding Examination Services, which is the organization responsible for administering the exams that witches and wizards must take in order to become certified broomstick riders.