An Apache server, also known as Apache HTTP Server, is a free and open-source web server software that is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation. It is designed to serve HTTP, or web, requests and serve information on the World Wide Web.
The Apache server is primarily used to host websites. It supports a variety of features including CGI, SSL, and virtual domains; it also supports plug-in modules for extensibility, allowing developers to add specific functionally to their server.
It’s highly customizable, whether hosting a personal website or a large-scale enterprise site, and it’s compatible with a range of operating systems like Unix, FreeBSD, Linux, Microsoft Windows, and more.