Battle.net is an online gaming platform developed by Blizzard Entertainment. It serves as a hub for players to access and play games like World of Warcraft, Overwatch, and Diablo. Users can create accounts, manage their game libraries, and connect with friends through the platform. In addition to game access, Battle.net offers features such as voice chat, social networking, and matchmaking services. It also provides regular updates and support for its games, ensuring a smooth gaming experience for players around the world.