In this video, we will successfully implement the ViewModel layer into our MVVM (Model-View-ViewModel) app. The ViewModel layer is often the most complex of the layers in MVVM because it includes most of the business logic for the app. This layer brings the entire app together and has connections to the View layer as well as the Model layer. Within the ViewModel, we will add all logic for downloading, updating, adding, and saving data for our app! Next video: https://www.youtube.com/watch?v=1QOLiELlpGk Last video: https://www.youtube.com/watch?v=SMt4_WUdKag