This option is mainly used when there is an AJAX-based theme which doesn’t load full pages while navigating from one page to another, in such cases, it will be unable to load required JS/CSS files of any plugins. So to overcome this issue ARForms  gives an option to load its JS or CSS in all pages of your website.

These will load ARForms required JS and CSS in all of the pages of a website and encourages forms of   ARForms in any environment of Themes or Plugins.

You are also able to choose which JS & CSS  are essentials, according to your need you just have to make switch enable and check the checkbox to make it load in all pages.