Web Servers are software applications which serve requests over the internet using the HTTP protocol. Coursera's Web Servers catalogue teaches you everything about the design, implementation, and maintenance of web servers. You'll learn about the architecture of the servers, understanding of HTTP and HTTPS protocols, how to configure user authentication and access control, manage security issues, and optimize server performance. By mastering web server technologies like Apache, Nginx, or Microsoft's IIS, you'll be able to build scalable and secure web applications, gaining a crucial skill for any full-stack developer, system administrator, or anyone involved in the digital technology space.