Tailwind CSS is a utility-first CSS framework that provides a collection of pre-designed classes to build custom user interfaces quickly. Unlike traditional CSS frameworks, Tailwind CSS focuses on atomic utility classes, allowing developers to style elements directly in their HTML. This approach promotes consistency and reusability, reducing the need for custom CSS. Tailwind CSS offers extensive configuration options, enabling developers to tailor the design system to their specific needs. It simplifies responsive design with intuitive breakpoints and facilitates rapid prototyping. With Tailwind CSS, developers can create modern, responsive, and maintainable web designs efficiently.