The text discusses Picture-in-Picture (PiP) mode, a user interface feature that allows a secondary window to appear alongside the main window or screen. This feature is useful for multitasking during video calls and conferences. It provides an overview of how to integrate PiP mode into a React application using VideoSDK. The tutorial covers essential steps such as setting up a development environment, installing VideoSDK, creating components for users, videos, and controls, and implementing the Picture-in-Picture feature.