You will need to be able to work on your feet and be able to bend and lift different size and weight of of product repeatedly. Also be able to put product on a shelf in the planned spot that it belongs. So being able to read a shelf label or tag and UPC. Those are the biggest things that would be needed to be a stocker. Experience doing any of the these things would give you a step ahead.

I would have to say, experience with working with your hands, standing on your feet periods at a time,and being able to organize in a decent manner.Also, being able to pay attention to detail would be necessary as well.