What are the benefits of using the font loader?
However if you load more than one font the font loader allows the the page to load before the resources are loaded. This can lead to a FOUT - flash of unstyled content, but it may mean that the page loads faster.
When the setting is disabled the template will load your fonts via the standard css link in the head of the template.
Which setting should you use?
In most cases users should have this option disabled.