What does do_action( 'twentytwelve_credits' ) do?

Hi folks,

I’m running a WP and customizing a child theme based on twentytwelve. Trying to customize the footer I’ve realized there’s the do_action( ‘twentytwelve_credits’ ); and I’d like to know what it does.

I’ve tried to remove it and nothing wrong/good seems to happen. The WP documentation says that do_action “Executes a hook created by add_action”, but I haven’t found any add_action with the “twentytwelve_credits” identifier, so my curiosity was triggered.

Thank you very much.