Cmdlets are lightweight commands used in the Windows PowerShell environment. They are designed to perform specific tasks, such as managing system processes, files, or network settings. Each cmdlet follows a standard verb-noun naming convention, making it easier for users to understand their functions, like "Get-Process" or "Set-Item." Cmdlets are built on the .NET framework, allowing them to interact with various system components and services. They can be combined in scripts to automate complex tasks, enhancing productivity for system administrators and developers. This modular approach makes it simple to create reusable code for common operations.