One of the most important things that business website owners often forget is that they get customers from mobile devices. Hence not having the mobile friendly checkout pages means not being able to sell to those customers. For those who are still unfamiliar with the term mobile friendly, it means web pages that are able to be accessed on mobile devices. When a person uses a smartphone or a tablet to surf the web, the screen size obviously gets smaller. Websites are originally made according to the larger screen sizes i.e. of the laptops and desktop PCs. So when you use any of those devices you do not feel any disturbance.