By default, Drupal instructs external caches (Varnish, CDN, browser, etc) to cache static assets, such as CSS, PDF, and JPG, for 1 year. Without a caching strategy for static assets, you're likely to experience some headaches with these files. In this session, we'll cover the Purge, Purge File, and Media Entity File Replace contrib modules, along with several others. We'll also dive into the Cache-Control header and how it can be leveraged to manage external caches.
