The next step, on your way to PowerShell mastery, is a solid understanding of what modules are, how they work, and why you need them in an enterprise environment.

Generally speaking, modules are packages for your functions. Think of a Java packages or a .NET namespaces as collections for classes, and so on. Modules can be very simple, and can quickly grow more complex with the more you add, such as help files, custom type extensions, formatting, unit tests, and ultimately, the integration into a release pipeline, which we will see in Chapter 11, VSCode and PowerShell Release Pipelines.