Frontend frameworks are tools that help developers build the user interface of websites and applications more efficiently. They provide pre-written code and components, allowing developers to create interactive and responsive designs without starting from scratch. Popular examples include React, Vue.js, and Angular. These frameworks streamline the development process by offering features like reusable components, state management, and routing. This means developers can focus on creating a better user experience while maintaining consistency and reducing the amount of code they need to write. Overall, frontend frameworks enhance productivity and improve the quality of web applications.