Django
Django is a high-level Python web framework that enables rapid development of secure and maintainable websites. It follows the model-template-views (MTV) architectural pattern and includes built-in features such as an ORM, authentication, and an admin interface. It is designed to help developers take applications from concept to completion as quickly as possible.
Developers should learn Django when building data-driven web applications, such as content management systems, e-commerce platforms, or social networks, due to its 'batteries-included' philosophy that reduces boilerplate code. It is particularly useful for projects requiring robust security features, scalability, and rapid prototyping, as it handles common web development tasks out-of-the-box.