Guanciale comes from the jowls of the pig, and while the Italian word guanciameans cheek, guanciale, in a very Italian turn of phrase, means "pillow." So think of this as a pork pillow.
It's cured similarly to bacon, but it's not smoked. It has an Italian flair: a bit of rosemary is included. With more fat than pancetta, it’s intense, indulgent stuff and greatly magnifies the flavor of your dishes.