2. Set a KPI to achieve as high of a conversion rate on mobile as on desktop
Divide your mobile conversion rate with your desktop conversion rate and let the "relative mobile conversion rate" help you track how your mobile site is getting stronger or weaker. Since the same campaigns and seasons affect both mobile and desktop, this metric will allow you to only see how the mobile site improves. The average for large ecommerce businesses in the US is 53%* – so set a target of 60% or 70%!
(*) Source: Monetate Ecommerce Quarterly, Aug 2018