A GUI, or Graphical User Interface, is a visual way for users to interact with computers and software. Instead of typing commands, users can click on icons, buttons, and menus to perform tasks. This makes it easier for people to use technology without needing to understand complex programming languages. GUIs are commonly found in operating systems like Windows and macOS, as well as in applications such as web browsers and mobile apps. They enhance user experience by providing intuitive navigation and visual feedback, allowing users to accomplish their goals more efficiently and effectively.