PowerShell

docs.microsoft.com
PowerShell - Link

Microsoft Tech Community -
PowerShell - Link

Microsoft PowerShell browser (website) - Link
This official Microsoft site is part of docs.microsoft.com and allows you to browse or search to find the product you would like the PowerShell module reference for.
Now you can just use a single bookmark and then search or browse for your product.
Example links include
- Azure Active Directory
- MSOL
- Teams
- Exchange
- SharePoint
- Skype for Business

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Unofficial - Tutorials -
Walk-Through of Building a New PowerShell Script - Link