Enclosures of this type were typically defined by a raised bank or ditch, sometimes both, encircling a domestic or ritual space. What makes any individual example worth pausing over is precisely the ordinariness of the category and the specificity of the place; Errew is not a name that appears in many accounts, yet the ground here has been considered significant enough to record and protect.

Errew itself is perhaps better known as the location of a medieval Augustinian priory, founded in the thirteenth century on a narrow peninsula jutting into Lough Conn, and the broader area has a long record of human activity reaching back through the early Christian period and beyond. An enclosure in such a landscape might relate to any number of phases of settlement, agricultural organisation, or ecclesiastical boundary-marking, though without more detailed survey information it would be speculative to assign it firmly to any one period or purpose. The term enclosure, in Irish archaeological usage, covers a wide range of features, and the interest often lies in how a particular example sits within its immediate surroundings, what it encloses, and what lies just beyond its edges.