Django is a high-level web framework written in Python that allows developers to quickly build web applications. It is designed to be fast, secure, and scalable. Django is based on the Model-View-Controller (MVC) architecture and encourages the use of reusable code and don't repeat yourself (DRY) principles. It includes an object-relational mapper (ORM) that allows developers to interact with the database using Python code.

Django was created in 2003 by Adrian Holovaty and Simon Willison while working on the Lawrence Journal-World newspaper website. It was released as open source software in 2005 and has since become one of the most popular web frameworks for Python. Django has a large and active community that contributes to its development and provides support through documentation, forums, and user groups.

Some of the features that make Django popular among developers are its built-in authentication system, automatic admin interface, and robust URL routing system. It also includes a templating engine that allows developers to create HTML templates and dynamically render content. Django can be used for a wide range of web applications, from simple blogs to complex e-commerce sites.