Nginx is a popular open-source software used for web serving, reverse proxying, caching, load balancing, media streaming, and more. Coursera's Nginx catalogue teaches you how to implement and manage these web server functionalities. You'll learn everything from installation and configuration of Nginx, handling of static and dynamic content, to server optimization and security. You'll also gain insight on how to manage server blocks, server directives as well as understanding the underlying architecture of Nginx. This skill is essential for system administrators, DevOps engineers, and anyone interested in efficient server management.