- Drupal is an open-source content management system (CMS) that can be used to create websites and applications. It was originally created in 2001 by Dries Buytaert as a college project. - Drupal has grown significantly since then and is now used by over 2% of the top million websites worldwide. Major sites like the White House, PopSci, and The Economist use Drupal. - Drupal provides tools and modules for building websites, including content types, themes, blocks, views, taxonomy, and user roles and permissions. It is highly customizable and can scale from basic personal sites to large complex sites.