Development Modules

This

What's known as plugin or addon in other platforms, is what we call a module in the Drupal universe. Drupal core itself is a a collection of modules as well and the community has added and maintains tens of thousands of individual modules on top of that.

allows that by using a simple

Drush is a CLI tool for Drupal. It's used by developers and administrators to initially setup, develop and maintain Drupal projects.

See also: DrupalConsole

command.