Ability for any product to be placed under several categories. At the moment a product can only choose 1 category in a dropdown. What makes sense is that a product can select multiple categories, perhaps not using a dropdown, but a tick box. Example: A product can fall under category "graphic design" and also "web development" and also "xyz". But at the moment, this is not possible. It will make a huge positive difference, quite restrictive as it is right now.