Family Sharing lets up to six family members with separate Apple IDs share apps and media, as well as iCloud storage, photos, a calendar, and locations. It‘s also required for Apple Music family plans.
The family organizer sets up and manages Family Sharing and is responsible for all charges incurred. The organizer can specify who is a parent or guardian, and who is a child.
The organizer can also require that all purchases made by a family member under age 18 must be approved by a parent or guardian (the specific age may vary by your location).