Apple introduced Auto Layout to help developers create adaptive interfaces that respond appropriately to changes in screen size and device orientation. By mastering Auto Layout, developers can create apps that look good across all devices. The tutorial covers the basics of Auto Layout, including its importance, different sections on Xcode, using auto layout in the interface builder, auto layout and constraints, the Auto layout menu, resolving layout issues, examining and editing constraints, and debugging. It also introduces Stack Views, which provide a streamlined interface for laying out views in columns or rows. With this tutorial, developers can learn how to create adaptive UIs that fit multiple screen sizes.