These upright monoliths, planted into the Irish earth during the Bronze Age or earlier, are among the most common yet least understood monument types in the country. They may have marked boundaries, served as waypoints, indicated burial sites nearby, or held meanings that were never written down and are now entirely lost. This particular example carries the added peculiarity of existing, as far as the public record is concerned, almost in a documentary void.

Standing stones across Clare vary considerably in scale and setting, from modest shin-height slabs in the middle of improved farmland to tall, commanding pillars on open hillsides. The name Knockreddan likely derives from the Irish, with cnoc meaning hill, suggesting elevated or prominent ground, which is a common enough setting for these monuments, perhaps because visibility mattered to whoever erected them. Beyond that topographical clue, the specific history of this stone, its dimensions, its orientation, whether it stands alone or in association with other features, remains unrecorded in any publicly available form.