Arch WSL refers to Arch Linux running within the Windows Subsystem for Linux (WSL). WSL is a compatibility layer developed by Microsoft that allows Linux distributions and their associated tools and utilities to run natively on Windows 10 and later versions. Arch Linux, known for its simplicity and customization options, can be installed and used within WSL to leverage its package management system (Pacman) and Linux command-line environment. Arch Linux on WSL is favored by developers, enthusiasts, and users who prefer Arch Linux's lightweight and customizable nature while benefiting from the integration and compatibility advantages provided by WSL on Windows.