Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. It follows the model-template-views (MTV) architectural pattern and emphasizes reusability, scalability, and maintainability. Django's built-in features include an object-relational mapper (ORM) for interacting with databases, a dynamic administrative interface for managing site content, a powerful URL routing system, built-in security features to prevent common web vulnerabilities, and internationalization support for building multilingual websites. Django's extensible nature allows developers to easily add new functionality through reusable applications and third-party packages. Django is used by thousands of developers and organizations worldwide to build a wide range of web applications including content management systems, social networks, e-commerce sites, and more.