Python is a high-level programming language that has become increasingly popular in recent years for developing web applications. Python's simplicity, readability, and versatility make it an ideal choice for developing web applications.

Python web application development involves using Python to write code that can be run on a web server to generate dynamic content in response to user requests. Python can be used with various web frameworks such as Django, Flask, Pyramid, and Bottle, which provide tools and libraries to make web development easier and faster.

Python can be used for developing a wide range of web applications, including eCommerce websites, content management systems, social networks, online marketplaces, and many more. Python web application development is especially well-suited for data-driven applications that require real-time processing and analysis of large data sets.