Steam is a digital distribution platform developed by Valve that serves as a storefront for video games, software, and even hardware. It allows users to purchase, download, and manage their game libraries while offering features like cloud saves, automatic updates, and multiplayer matchmaking.

Beyond just a store, Steam has evolved into a social hub for gamers, with community forums, game reviews, and live-streaming capabilities. It also provides tools for developers through Steamworks, enabling them to integrate features like digital rights management (DRM), achievements, and mod support.

Originally launched in 2003, Steam has grown into one of the largest gaming platforms, supporting Windows, macOS, Linux, and mobile devices. It has also expanded into hardware with products like the Steam Deck and Valve Index.