How to contribute to PowerShell documentation
The Contributor's Guide is a collection of articles that explain the tools and processes we use to create documentation at Microsoft. Some of these guides cover information that is common to any documentation set published to docs.microsoft.com. Some of the guides are specific to how we write documentation for PowerShell.
The common articles are available in this centralized Contributor's Guide. The PowerShell Contributor Guide is available Community section of the PowerShell documentation.