Drupal is a free and open source content-management framework written in PHP and distributed under the GNU General Public License. This provides a back-end framework for at least 2.3% of all web sites worldwide. Ranging from personal blogs to corporate, political, and government sites. Systems also use this technology for knowledge management and for business collaboration.

As of January 2018, the tech community is composed of more than 1.3 million members. This includes 109,800 users actively contributing, resulting in more than 39,500 free modules that extend and customize it’s functionality. Over 2,570 free themes that change the look and feel of Drupal, and at least 1,200 free distributions that allow users to quickly and easily set up a complex, use-specific in fewer steps.

The standard release of Drupal, contains basic features common to content-management systems. These include user account registration and maintenance. Also includes menu management, RSS feeds, taxonomy, page layout customization, and system administration.