In web development, the front-end refers to the aspects of a website or application that users see and interact with directly, such as the graphical user interface (GUI), including layout, design, navigation, and functionality. It is built using technologies like HTML (for structure), CSS (for style), and JavaScript (for interactivity). The front-end is responsible for the user experience and visual aesthetics of a web page, ensuring that the site is intuitive, responsive, and accessible. It works in conjunction with the back-end, which handles server-side operations and data management.