Joomla is a free and open-source content management system (CMS) used for publishing web content on websites. It is written in PHP, uses object-oriented programming techniques, and stores data in a MySQL database. Joomla is designed to be used by people with basic website creation skills and requires an Apache–MySQL–PHP server like LAMP or WAMP. It includes features such as page caching, RSS feeds, blogs, search, and support for language internationalization. Joomla is maintained as an open-source project by a community of volunteers and is licensed under the GNU General Public License. It is trusted by well-known companies and millions of websites worldwide. Joomla can be used to build various types of websites, including online stores, directories, customer service systems, membership sites, and blogs. It is highly extensible, with thousands of extensions available in the Joomla Extensions Directory.