For someone who doesn't know much about purebred dogs, all those initials are bewildering. Why do more than half the dog ads you look at say AKC on them? Should you be looking for ads that have those initials?
AKC stands for the American Kennel Club, the oldest existing puppy registry in the United States. It is a way for people to keep track of pedigrees and try to improve their dog breed. The registry does not accept all dog breeds and not every purebred dog of a recognized breed is allowed to be registered by this organization.