Wedge tombs are the most numerous of Ireland's megalithic tomb types, built roughly between 2500 and 2000 BC during the late Neolithic and early Bronze Age. They take their name from their characteristic shape: a roofed stone gallery that narrows and lowers from one end to the other, typically oriented with the wider end facing west or south-west. The Knockshanbally example belongs to this tradition, a structure that was already ancient when the first Christian monasteries were being founded in Ireland.

The principal scholarly record for this monument comes from the work of Ruaidhrí de Valera and Seán Ó Nualláin, whose survey of the megalithic tombs of County Mayo was published in 1964 as the second volume of their broader national inventory. That project documented the distribution and condition of these structures across the country at a time when systematic fieldwork of this kind was still relatively new. Mayo, with its boggy uplands and thin soils, preserved a significant number of such tombs, many of them on marginal land that was never heavily ploughed or built over. The Knockshanbally tomb has also been afforded legal protection under the National Monuments Acts, a designation that reflects its recognised archaeological significance.