From the good folks at the Westminster Kennel Club:
Each dog at a dog show is presented to a judge by either its owner, breeder, or a hired professional. This person is known as the exhibitor or the handler of the dog.
The purpose of conformation shows (also known as dog shows) is to evaluate breeding stock. Judges select winners based on their ability to contribute and improve the next generation of dogs. Dogs start out in the classes competing for points toward their AKC championship title. Dogs win points based on the number of dogs defeated. The more dogs entered, the more points per win. It takes fifteen points, including two majors (wins of three, four or five points), awarded by at least three different judges, to become an American Kennel Club champion. Continue reading Westminster 2021: Conformation Primer