A litter scoop for cats picks up clumps while letting unused litter fall back into the tray, so you're being economical. A cat litter scoop is useful as you need not risk contact with the clumps in the litter tray.A litter scoop for cats picks up clumps while letting unused litter fall back into the tray, so you're being economical. A cat litter scoop is useful as you need not risk contact with the clumps in the litter tray.