Drupal is a free and open-source content management system (CMS) that allows users to build complex websites and projects. It supports features like content management, collaborative authoring, and extensions through modules. However, Drupal requires more technical skills than WordPress, as users need knowledge of HTML, CSS, and PHP. WordPress is more beginner-friendly and only requires 5 minutes to install, while allowing users to easily create and modify blogs and websites through an intuitive interface and thousands of available themes and plugins. Both CMSs have large communities and frequent security updates, but WordPress is generally better suited for simpler blogs and smaller sites, while Drupal is more appropriate for complex websites and projects.