Drupal’s flexibility and potential for customization make it an excellent foundation for building a high-performing website.
Here I am listing some methods to clear Drupal caches. Drupal caching is done to improve and enhance overall performances of the site. Its always recommended to enable the page caching and block caching in Drupal.
If you have a multi-site installation that has multiple settings.php files, say '/sitename1.com/settings.php' and '/sitename2.com/settings.php' and so on. Trying to run Drush commands to clear cache from different directories and changing directories all the time is going to be a mess.
When a user frequently visits a webpage, the browser automatically saves or in other words caches that particular page. This helps the user to access those pages in future which saves time. However due to caching, the changes made on a site do not reflect at once and its not useful during development or testing of a Drupal site. Therefore it is important that testers clear the cache before they start testing. Caching can be performed by both the site and the browser. Read on to know how to clear the Drupal cache.