This lesson focuses on Nested Stacks. In CloudFormation, Stacks can be nested to promote code reuse and to simplify the modification of commonly used elements. In the lesson, the student will learn about the use cases for nested stacks and how to construct a nested stack. The lesson will conclude with a walkthrough on creating a complex nested stack that has six child stacks below the root stack. After the nested stack is constructed, the stack will also be deleted to illustrate the interdependence of the stacks even during deletion.