If this option is enabled, all visible file/directory paths will be cropped with the root path. So for example if you set the root path to /www/myfiles and have the path set to /www/myfiles/somedir the presented path will be /somedir. This option is very useful if you have user or project specific directories.
Example of usage in the config.php file
$mcFileManagerConfig['general.user_friendly_paths'] = true;
Example of usage in the Web.Config file
<add key="general.user_friendly_paths" value="false" />
Example of usage in a mc_access file