Drupal 8 represents a major new release of the Drupal content management system. It took over 4 years and input from over 3,200 developers to create. Drupal 8 introduces hundreds of new features and improvements, and is built using Symfony components which make it more modern and object-oriented. Pantheon will help support sites using Drupal 8 by providing one-click updates and an optimized platform. While Drupal 8 differs significantly from prior versions, adopting it will help sites benefit from new functionality and prepare for the future of Drupal development.