This tutorial explains how to create a Flask application that uses LaunchDarkly feature flags to dynamically change the color of Google Maps markers. The application is built using Python 3.6 or newer, Visual Studio Code or another IDE, and the Google Cloud Console for a free API key. The tutorial covers setting up the environment, creating a feature flag in LaunchDarkly, configuring the Flask application, and integrating the LaunchDarkly SDK to evaluate the feature flag. The example demonstrates how to toggle the color of markers on a map by changing the value of the feature flag, showcasing the benefits of using feature flags for real-time experimentation and deployment of web applications.