1. Clear by cache size: If you enable this option, the plugin will clear caches when the cache size reaches a predefined threshold. The maximum cache size can be specified in the cache size field below in MB, GB, or percentage..
2. Clear after a specific interval: If you enable this option, the plugin will clear caches after a predefined interval, regardless of cache size. It supports minute, hour, and day intervals, specifying how long the cache will be cleared for in the clear cache every field.
3. Execution link: If you enable this option, the plugin will quickly clear caches whenever a request is made to the Execution link below.
Copy 
the execution link, and enter it on the browser whenever you need to clear caches. You can generate a new Execution link by clicking on the 
icon.
This method is frequently used if you are required to clear all CSS/JS caches but you don’t want to provide admin login to other users.
* Note: You can use the 3 methods above at the same time.