What is Jonas's assignment in the book the Giver?

The Receiver of memory; Jonas will take lessons with the "Giver", training him to become the future "Giver". What the receiver does is take memories of things like color, animals, snow and other things nonexistent in Jonas's world. He will become the most knowledgeable man in all of his world. He will be called for when the people are in a time of panic or when they do not no what to do.