Hi all, just a general question. I couldn't find this in the documentation so I thought I'd ask here.

Under System -> General Configuration, there is an option to specify your "main site." When toggled on, it accepts a name and a url. After enabling this option and providing the requested information, I took a cursory glance to the front-end of my website and found nothing to be visibly different.

What does this setting actually control? Is it just setting the field for API purposes or does this option have an effect somewhere?