An interface is a point of interaction between two systems, devices, or software applications. It allows different components to communicate and work together effectively. For example, a user interface (UI) enables users to interact with a computer program through visual elements like buttons and menus. In technology, interfaces can be categorized into various types, such as graphical user interfaces (GUIs) and application programming interfaces (APIs). A GUI provides a visual way for users to engage with software, while an API allows different software systems, like web applications and databases, to exchange data and commands seamlessly.