The Square button handles melee strikes that can be bashed out or used with held presses for a variation (I had to look that latter feature up online though). (nosleepgamer.com)
It was the latter feature that got my attention. (inc.com)
The latter feature helped one restaurant catch a supplier error that had the restaurant paying for boxes of 20 hamburger patties but receiving boxes that contained only 18. (entrepreneur.com)