New in Unity 2018 LTS are Nested Prefabs, which allow you to maintain a reference to a Prefab inside another Prefab. With Nested Prefabs, you can build and more easily maintain complex objects that add realistic detail to your projects.
By the end of this project, you’ll be able to:
Create Nested Prefabs
Create Prefab Variants
Manage Nested Prefabs and Prefab Variants in your projects