Black Friday 2010 brought e-commerce sales of $648 million (Comscore). In 2016, that figure rose to $3.34 billion (Adobe), a 415% increase. Mobile has played an increasing role on Black Friday. It accounted for 36% of this year’s online sales.
I kept some screenshots from my 2010 study. I have put them side-by-side with screenshots from today. Oh, how mobile commerce has changed!