In Zumba, you move every which way. You will move forward, back, side to side, and even do some lateral twisting. Because of all this different movement, you really need a shoe with very little tread, so you can glide on the floor. If your shoes have high tread, you can injure your knees doing Zumba.
Really, the best way to figure out the best shoes for Zumba FOR YOU is to try them out. Either order them online and dance around your living room, or go to the athletic shoe store and try them on. Some feet like certain shoes. It really is very personal which shoes are best for Zumba for your feet. Be sure to find shoes with low tread so you save your knees!