Material Design Lite (MDL) is a front-end toolkit developed by Google that enables developers to incorporate Google's Material Design principles into their web applications. Lightweight and easy to use, MDL offers a collection of CSS and JavaScript components that are optimized for modern web design practices. It allows for the creation of responsive and mobile-friendly user interfaces without relying on extensive external libraries. Although actively maintained, developers should note that Google's focus has shifted towards Material Components for the web, the successor to MDL, which provides more advanced and extensive features.