ZURB Foundation is a responsive front-end framework designed to help developers create websites and applications quickly and efficiently. It provides a set of HTML, CSS, and JavaScript components that are mobile-first, meaning they work well on both desktop and mobile devices. This framework is known for its flexibility and ease of use, making it a popular choice among web designers. The foundation includes a grid system, pre-styled UI elements, and various tools for building responsive layouts. It also supports customization, allowing developers to tailor the framework to meet specific project needs. Overall, ZURB Foundation streamlines the web development process.