PowerShell is a powerful scripting language, automation framework and command-line shell developed by Microsoft that is built on the .NET framework. It is an essential tool because it allows system administrators and developers to automate and optimize complex administrative tasks across multiple systems efficiently. PowerShell's deep integration with Windows and other Microsoft products makes it an invaluable tool for administrating, managing and optimizing Windows environments. Designed as a cookbook, this book enables readers to expand and build upon their current PowerShell knowledge and skillset. Topics covered in detail include creating PowerShell unit tests using Pester, managing and administrating Azure and AWS cloud services, remote script execution, Active Directory management, PowerShell desired state configuration and more.