A cairn, in the broadest sense, is a mound of stones raised over a burial, sometimes covering a chamber, sometimes simply heaped as a marker across centuries of use and reuse. The Poulawack cairn is one of the more quietly significant prehistoric monuments in a region already dense with megalithic remains, yet it receives a fraction of the attention given to better-known sites nearby.

The Burren's cairns belong broadly to the Neolithic and Bronze Age periods, when communities across Ireland were constructing elaborate stone monuments for their dead. What makes Poulawack of particular interest to archaeologists is the evidence of multiple burials accumulated over a long span of time, suggesting the site held meaning across generations rather than serving a single funerary event. The limestone geology of the Burren, which weathers into bare pavements and grikes, preserves the outlines of such monuments with unusual clarity, the stones neither swallowed by peat nor obscured by dense vegetation.