D4Drupal provides a comprehensive tutorial on guiding users through the process of setting up a multisite configuration in Drupal 10, Drupal 9, and Drupal 8. The step-by-step guide covers creating multiple domains with a shared codebase and distinct databases for each site. Demonstrations include establishing virtual hosts for different domains, configuring the sites.php file, and managing specific settings.php and services.yml files for each site. The tutorial showcases the inherent flexibility of Drupal's multisite capabilities, emphasizing the ability to maintain common files while accommodating site-specific modules and themes,