The single most important factor is reliability and trust. If you hope to encourage sales then you need a site that reassures your customers when they’re entering their card details. If your site doesn’t look perfectly professional, then they will often simply look elsewhere.
At the same time, e-commerce store design needs to employ a layout that makes it as easy as possible for customers to make purchases. You need to ensure there are no barriers to sale, so that you can encourage impulse sales. The buy with one click feature of Amazon is one of the biggest secrets to the company’s considerable success; if there are too many stages involved in buying then you will lose business.
But it gets more complex than that too. The right e-commerce store design should use the correct layout and organization in such a way as to encourage more sales. You can encourage more sales of an item simply by carefully choosing which item you position it next to and what color you make your buy button. Great e-commerce store design requires an understanding of psychology then and this is something that any development company should be able to bring to the table.