The Family Sharing feature, as the name implies, will allow families and groups of people to share apps without having to connect to the same Apple ID. Since the introduction of the App Store, folks have shared the same account in order to save on buying many of the exact same apps or content, but the system is flawed in that every user of said account then has a list of content that they don't want or need, and never actually downloaded in the first place. To resolve this, Family Sharing essentially binds a number of Apple IDs into one parent account, and provided that they all feed from the same credit or debit card, can readily go ahead and download apps and content purchased by other members of the same family.