The term "Pack Leader" refers to a person or animal that leads and takes charge within their group, setting rules and guidelines for others to follow. In the context of dog training, it is often used to describe someone who assumes responsibility as the dominant figure in a pack of dogs, establishing themselves as the leader by using calm-assertive energy, clear communication, and consistent boundaries. The idea behind this approach is that when dogs have a strong sense of structure and leadership from their human, they are more likely to feel secure, confident, and well-behaved.