The Apache HTTP Server, often simply referred to as Apache, is one of the most widely used web servers on the internet. It is open-source software developed by the Apache Software Foundation and runs on various operating systems including Linux, Unix, Windows, and others.
Apache is a modular web server that provides a wide range of features including the ability to serve static and dynamic content, support SSL encryption, configure virtual hosts, apply URL redirection and rewrite rules, implement authentication and authorization, and much more.
Due to its flexibility, stability, and extensibility, Apache has been one of the most popular web servers for hosting environments and web applications of all kinds for many years. Its open-source nature has fostered a large community of developers and administrators who continuously work on its development and improvement.