The tutorial demonstrates how to add a kill switch feature flag to a Flask application using the LaunchDarkly Python SDK. The kill switch allows for quick shutdown of features in the application, such as external API calls, to prevent disruptions or spam. The tutorial covers setting up the development environment, creating and configuring a kill switch flag, and integrating the LaunchDarkly client with the Flask application. It also provides examples of how to use the kill switch feature flag to enable or disable specific features in the application.