The phrase "to become the pack leader" refers to taking on a leadership role within a group or organization. It means assuming responsibility for making decisions, setting direction and managing resources in order to guide the group towards achieving its goals. The term is often used in relation to dog training, where it describes the process of establishing oneself as the dominant member of a pack in order to assert control over other dogs or animals. In broader terms, becoming the "pack leader" can refer to taking charge and assuming responsibility for any group or organization, whether it be a team at work, a family unit, or even a community.