Great! After all these development steps, you have an actual website or application with a user-friendly interface. But wait a minute… When users register, this data needs to be stored somewhere, right? For the part of websites/applications that users don't see, we need back-end development, and among all programming languages, Python is one of the best options. Together, we'll create a simple application for picking a movie for the night (with popcorn from the front-end section).