What was the previous Receiver's job with Jonas in The Giver?
In this book, the previous Receiver of Memory has to give all of his memories to Jonas. He is also supposed to teach Jonas how to deal with having all these new memories and how to use them to help the community. Jonas asks the previous Receiver what he should call him. The previous Receiver decides that his job should now be described as the Giver of Memory. This is where the title of the book comes from.
Much of the second part of the book is devoted to "watching" as the Giver gives Jonas memories and these memories change Jonas's way of thinking.