A beginners guide to caching in Drupal 8
Caching is a popular technique to optimize the performance of a website. It is a process that stores web data (HTML, CSS, Image) in some accessible space. Moreover, a cache is a detailed information of a validity of a resource. This information defines for how long the resource is valid and should not be considered stale. The information can be stored at every level right from the original server to intermediate proxies to the browser.