As Drupal tries hard to optimize a site, there are quite a few items that are cached. This requires us to know how to clear the cache to ensure that configuration changes are applied. For example, anytime we develop a theme, install a module, or work with the API, we will find ourselves needing to clear the cache. To utilize the administration panel, we simply need to click on the Clear all caches button located under the CLEAR CACHE section:

Since we will be clearing the cache quite often, it helps to know how to utilize both Drush and Drupal Console to clear the cache using the command line.