Web frameworks are essential tools that simplify the process of building and maintaining web applications. They provide a structured foundation, allowing developers to focus on creating features rather than dealing with the underlying complexities of web technologies. Popular frameworks like React, Angular, and Django offer various functionalities that cater to different development needs. These frameworks often come with built-in libraries and tools that enhance productivity and ensure best practices. By using a web framework, developers can create responsive, efficient, and scalable applications while reducing the time and effort required for coding from scratch.