This tutorial guides developers on how to add virtual backgrounds in Android using the Agora Android SDK and the Agora Android UIKit. The process involves setting up the necessary permissions, importing required dependencies, and implementing the virtual background feature within the video call application. Virtual backgrounds can be added in three ways: using an image as a background, applying a solid color to the background, or applying blur effects to the existing background. The tutorial also provides information on how to enable/disable virtual backgrounds and testing the app on a physical Android device.