Graphical user interface (UI)

A user interface (UI) serves as the interactive layer between users and a software application or hardware device. While this can include physical components like keyboards and mice, most modern interactions occur through a graphical user interface (GUI). GUIs use a combination of text, links, buttons, and graphical elements to facilitate a more intuitive and engaging user experience.

Essentially, the UI is not just about what users see but also how they interact with an application, making it a critical aspect of software design that directly influences user satisfaction and engagement.