A cairn, in the broadest sense, is a mound of stones raised over a burial or used as a landmark, and the example at Poulawack belongs to a prehistoric tradition found across Ireland and Britain. What sets it apart is the particular quality of its setting: the Burren is one of the most archaeologically dense landscapes in Ireland, its bare karst surface preserving monuments that would have been swallowed by soil and vegetation almost anywhere else.

The Poulawack cairn is a Bronze Age burial monument, and excavations carried out in the 1930s revealed it to be a multiple-cist cairn, meaning it contained several stone-lined grave boxes, or cists, rather than a single central burial. The remains of a number of individuals were found inside, along with animal bones, suggesting the site had been used over an extended period rather than for a single interment. That kind of accumulated, layered use is characteristic of Bronze Age burial practice in Ireland, where a monument might begin with one burial and accumulate others across generations. The Burren's thin soils and exposed rock meant that communities here were building in stone from an early period, and Poulawack fits into a wider pattern of cairns and megalithic tombs scattered across the plateau.