In this video we will learn the basics of how to use Preference Keys and then jump into some realistic examples of when this would come in handy in a real-world iOS application. In order to get the most out of this video, it is recommended to have watched the previous videos in this series on Generics and ViewBuilder. Generics: https://www.youtube.com/watch?v=rx3uRICZr5I ViewBuilder: https://www.youtube.com/watch?v=pXmBRK1BjLw