There have been numerous studies on mobile traffic and these show that there are now significantly more users accessing the web from tablet or smartphone than desktop.
This means that online sellers need to ensure that their product pages are optimized for mobile. In particular, on Amazon search results will show your product information differently on mobile than desktop so it is imperative that the listing is optimized for both. Also today buyers are becoming more impatient and, if they do not see the information they want right away, they will move on in seconds to your competitors.
Review your product page on all devices to see what the differences are and make sure the first information customers see is concise, relevant and keyword rich.