Drupal Website Development is the process of building, customizing, and maintaining websites and applications using the Drupal open-source content management system (CMS). As a specialized discipline within web development, it leverages Drupal's highly flexible and modular architecture, which is grounded in computer science principles, to manage digital content and create everything from simple blogs to complex, data-intensive web applications. Developers utilize Drupal's core functionalities, contributed modules, and theming system—often requiring proficiency in PHP—to construct robust, scalable, and secure digital platforms suitable for enterprise, government, and higher education institutions.