Drupal is free and open-source software that can be used by individuals or groups of users-even those without technical skills-to easily create and manage many types of Web sites. The application includes a content management platform and development framework.
There are three different types of Drupal modules - core, add-on and custom . Core modules are included in the initial Drupal download and can be enabled or disabled without the need to load any additional components. Optional modules must be downloaded separately and added to your website.
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