Your Neto web shop design, in many cases, is the determining factor for a lot of customers as to whether they will buy from you or not. Broken or poor quality looking web pages will usually scare people off; the credibility and trust disappears and people are worried that you might process the orders with the same types of faults as your web shop.
When choosing a theme, try and think about layout you would like to use for your store, some of the designs you've seen in the past that have caught your eye and see if we have a pre-made theme that fits your requirements. All of our themes are fully responsive, so any theme you choose will work out of the box on both desktops and mobiles.
For more information on this subject, see our comprehensive support articles.