Pork belly is beautiful. It's layers of fat and meat. When it's cooked, slowly, the fat renders off, leaving lovely, tender meat.
It is often cooked with the skin, which will go crispy - a bit like crackling.
Pork scratchings are made entirely from the skin - it's roasted skin and fat that goes crispy.
Both are lovely in their own way!
But pork belly, either in a piece or in squares, is fabulous. The Chinese cook it particularly well.