Flask is a lightweight and flexible web framework for building web applications in Python. It is often referred to as a “microframework” because it provides the essentials for web development but leaves the rest up to the developer, giving them the flexibility to choose other components (such as databases or form validation) as needed.

Flask is popular because of its simplicity, minimalism, and extensibility. It’s suitable for both beginners and experienced developers, enabling them to quickly build small to medium-sized applications or APIs, and scale them as needed.

Key Features of Flask:

1. Lightweight and Minimal:

   • Flask provides just the basic tools needed for web development, like routing, templating, and handling HTTP requests. There are no mandatory components (like ORM or form handling), allowing developers to decide how to structure their application and what tools to use.