This is primarily a tool for developers -- especially web developers and those who work on or with open source projects. This allows those who want/need to use Bash, common Linux tools (sed, awk, etc.) and many Linux-first tools (Ruby, Python, etc.) to use their toolchain on Windows. WSL provides an application called Bash.exe that, when started, opens a Windows console running the Bash shell. Using Bash, you can run command-line Linux tools and apps.