When designing an online store should start with the basics. What do our customers want? What do you expect from our website? How can we improve your user experience? Knowing what our online store must contain, before you even begin to design it, it is basic.
Having resolved these doubts, we know how we have the items in the online shop. For this there are supports tools used to know how our customers behave in a web page. But for this we must first have mounted online store and go modifying proving that facilitates the purchase to your users. A very useful tool is Hotjar, with it you can get basic information to know what elements are the most used and the most turn your users.