UA Bootstrap is the University of Arizona's flavor of Bootstrap (aka "Twitter Bootstrap"), a popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web. If you're looking to adopt consistent styling of web elements, this is the best place to start.
Looking for a preconfigured version of Drupal? UA Quickstart is just that — a Drupal distribution and install profile intended to provide a foundation for developers building Drupal-based sites. UA Bootstrap provides a portion of the frontend styles found within UA Quickstart.
Questions, bugs, or suggestions can also be emailed to brand@email.arizona.edu