MUD clients are software applications designed to connect users to MUDs (Multi-User Dungeons), which are text-based online multiplayer games. These clients allow players to interact with the game world, communicate with other players, and manage their characters through a command-line interface. Many MUD clients offer features like customizable interfaces, macros for repetitive tasks, and support for various protocols. They enhance the gaming experience by providing tools for easier navigation and interaction within the MUD environment, making it more accessible for both new and experienced players.