WSL, short for Windows Subsystem for Linux, is a compatibility layer in Windows operating systems that allows users to run Linux distributions. It provides a seamless integration of Linux and Windows, enabling developers and users to utilize the power of Linux tools and utilities directly on their Windows machines. WSL creates a virtual environment where Linux can be easily installed and run alongside Windows applications. It supports a wide range of Linux distributions, including Ubuntu, Debian, and Fedora, providing users with a familiar Linux environment. WSL has gained popularity among developers, as it simplifies the development process by enabling the use of Linux tools and workflows on Windows without the need for dual-booting or virtual machines.