Whether you are a Digital Marketer looking to adopt Open Source and Drupal for the first time, or an Engineer, Strategist or Project Manager assigned to a Drupal project, it’s critical that you define your approach to the “3 C's" of Drupal: Core, Contrib and Custom.  This decision directly impacts the performance, scalability, and maintenance of the websites and/or other digital assets that you are powering with Drupal.