Lesson Summary: In this video, you will learn how you can create and configure versions and aliases on your Lambda functions. This will allow you to effectively develop Lambda functions in a more sophisticated development workflow that can promote functions between different stages like Production, Development or Staging. You will also learn how aliases will allow you to perform traffic splitting that is an essential part of Blue-Green deployment processes that test the quality of a deployment by splitting traffic between the existing deployment and the newest version. These concepts and tools are critical for any development workflow because they allow you to ensure more effectively test that your code is reliable and free from errors. By the end of the video, you should feel comfortable creating aliases and versions for your Lambda functions using the AWS console and understand the core benefits of these tools when developing Lambda functions.