Building the reponse to Drupal requests can be resource intensive, saving and serving that data from cache is quite a bit faster and can allow you to scale up in your ability to serve your site when you really need it.
In this we take a quick trip through the Drupal core caching system, and how to set them up to use Drupal with some popular CDN/WAF systems. This is focused on Drupal and contributed modules, and some example settings for your WAF and CDN that is works well with a variety of CDN solutions.
We'll also spend some time taking a look at common issues that can crop up with caching, and ways to resolve them. These will all draw from real examples and production sites, but the names will be changed to protect the innocent.
If there's time we'll also talk about the recent impacts to site traffic within the least year with the AI boom.