Steam is Valve’s digital video game distribution service. It was launched in September 2003 as a standalone software client allowing Valve to provide automatic updates to its games and was later expanded to include third-party games. Steam has also become a web- and mobile-based digital store.
Steam offers digital rights management (DRM), server hosting, video streaming, and social networking services. It also offers users automatic game installation and updates, as well as community features such as friend lists and groups, cloud storage, and in-game voice and chat.