Removing friction from the online shopping experience has accelerated the growth of digital commerce. Conversion rate is an outdated metric, as mobile devices allow for more spontaneous, interrupted shopping sessions. Mobile phones now fuel the majority of commerce growth, with average visit times on phones shorter than desktops. The shopping cart has become the new focus, with add-to-cart rates and cart creation up significantly on mobile. By removing points of friction, online retailers have seen more visits, orders, and higher sales per customer.