Reducing the Number of Minified Files
WP Rocket combines minified files into little groups for better compatibility and performance. Generally speaking, a greater number of smaller files usually would perform faster than a smaller number of larger files. That is because browsers can download multiple files in parallel.
This setting can reduce the number of HTTP requests on your website, but depending on your setup of theme and plugins, it can also lead to broken functionality.
Heads up! Test this setting thoroughly and make sure no functionality is broken on your site. If you notice any issues after activating this setting, deactivate it again and those issues should be resolved.