The main function of a software framework is to provide a structured foundation that simplifies the development of applications by offering reusable components and tools. Frameworks establish a predefined architecture, allowing developers to focus on writing application-specific features rather than the underlying infrastructure. By promoting best practices, they lead to more efficient coding and easier maintenance. Frameworks often come with libraries and tools for common tasks, enhancing productivity. Examples include React for frontend development and Django for backend services, both of which streamline the development process.