Consider the image below (the red arrow was added by me, if that's not obvious...)
The heading itself is "Budget and Ownership," but there's a prefix or qualifier of "Challenge #1." Those words aren't part of the heading per se, but rather exist just to put the actual heading in context -- to say, in effect, "this is the first of a series of headings."
The heading itself could actually stand alone. "Challenge #1" just...helps.
Is there an official name for that prefix/qualifier? My gut tells me..."meta-heading" or "super-heading" (as in, before or above) but I feel like I might be re-naming something that already exists.