The structure is a souterrain, a type of subterranean chamber or tunnel built during the early medieval period in Ireland, typically constructed from dry-stone walling and roofed with large capstones. They are found across the country in considerable numbers, often associated with ringforts, and their precise function has long been debated: storage of perishables in cool, stable conditions is one explanation; refuge or concealment during raids is another; some sites suggest both uses at different times.

The Luffertan souterrain is recorded as a monument, placing it within a long tradition of such structures across Connacht, where early medieval farming communities shaped the landscape in ways that still occasionally break the surface, whether through collapsed rooflines or the tell-tale depression in a field. Sligo's archaeology is varied and deep, running from megalithic tombs on the slopes of the Bricklieve Mountains to early Christian enclosures scattered across its lowlands, and souterrains form one quieter thread through that longer sequence. Without more specific detail available for this particular example, what can be said is that its presence in Luffertan adds to a pattern of early settlement activity in the region that formal survey work continues to piece together.