steam:tldr:207b9

The command "steam -shutdown" is used to shut down the Steam client running on your computer.

Steam is a digital distribution platform developed by Valve Corporation used for purchasing and playing video games. When you launch the Steam application on your computer, it opens a client that manages your games, updates, friends list, and various other features.

By entering the command "steam -shutdown" in the command prompt or the "Run" window (accessible by pressing Windows Key + R), you are instructing the Steam client to close and terminate all its processes. This action will completely close the application, including any games or updates that may be running. It essentially force-stops Steam and all associated services.

It is worth noting that this command could cause you to lose unsaved progress in any games or tasks being performed within the Steam client, so it's recommended to manually close any running games or save any work before running the command.