You can find references to it in the autogenerated documentation.

$oTemplate->setPageHeader($oDb->getParam('site_title')." :: Whatever You Want");

Title is useful for SEO - what the listing looks like.  Should be added to the splash page.

I was hoping to find a way to add the header and footer to a blank page I could add HTML to. Nothing there.  Down to one UNA project for a non-profit Wild Horse advocacy group.

Clients are grumbling about the product, bugs, slow speed, and timely updates.  I think UNA has great potential - especially if they upgrade to Apostrophe and Redux, Vue, or an equivalent.