Application Servers are software frameworks that provide both facilities to create web applications and a server environment to run them. Coursera's Application Servers skill catalogue teaches you how to build, deploy, and manage web-based enterprise applications. You'll learn about various types of application servers such as Apache Tomcat, JBoss, WebLogic, and others, along with understanding their architecture, configuration, and optimization. You'll also gain knowledge of server-side programming languages, database connectivity, and application scalability and security, preparing you for roles in web development, systems administration, or any field that requires intensive web-based software solutions.