WordPress (WP, WordPress.org) is a free and open-source content management system (CMS) written in PHP and associated with a MySQL or MariaDB database. The features include a plugin architecture and a template system, called Themes in WordPress. online. WordPress is used by over 60 million websites, including 39% of the top 10 million websites as of January 2021, WordPress is one of the most widely used content management system solutions. WordPress has also been used for other areas of application, such as ubiquitous display systems (PDS).