Salted and cured until nearly dry but not smoked, guanciale has an intense piggy flavour and keeps for months. It's an essential ingredient in the classic pasta sauces of Lazio: alla gricia, all'amatriciana and alla carbonara.
Other words for guanciale, mostly from central Italy, include barbaglia, barbozzo, barbagia or goletta
Also see gota.
Image by Ketzirah Lesser & Art Drauglis