A module is block of code in Drupal which provides some functionality. Modules are either built into the core Drupal code or are contributed by members of Drupal open source community. Popular contributed modules are often incorporated into Drupal core as time goes on. Modules must be enabled and in some cases configured to work properly.
Several modules are included with the MIT Drupal Cloud distribution. For security purposes, IS&T will distribute all modules centrally. Any Drupal Cloud user at MIT may suggest modules for IS&T to distribute and support in the future. To do so leave a message in the Feedback area under the Community link above.