One thing to note that people looking up items was mostly phone. That is probably indicative of people seeing if the brick and mortar price is *really* a good deal or they would just as soon get the item online. I suspect most cell phone browsing is done in store (which would indicate a desire to better research the purchase in front of them) and probably same for purchases (brick and mortar highlighted awareness, and shopper bought from the cheaper source (this is why someone would get something online instead of 'where they are').
They also apply the term 'mobile' in a disingeneous way. They refer to both cell phones (which people tend to only resort to when truly on the move) and tablets (which generally are used in the same situations as the users would have used laptops otherwise). I personally would be using a laptop for any browsing activity (web navigation I find easier with conventional interfaces and tablet I tend to use only for reading and video ever so often), but a lot of people use tablets for almost all their computing activities nowadays. Some people draw the line at laptop v tablet for things that require complex cursor manipulation and/or text entry, but online shopping is generally neither of those things.