I love this product! Great solution to a super annoying problem. <3
Attach one clip to the inner edge of one cup at the desired location and the second clip to the inner edge of the other cup;
Look in the mirror: if you want more support and cleavage, release the clips and adjust each clip position upward on the cup edge. If you want less support, release and adjust the clip's position downward along each of the cup edges.
For a more discreet look with tighter fitting tops, you can secure the clips bottom side out on your bra.