Despite the dramatic gains mobile commerce has made in recent years, the average desktop device conversion rate of 3.9% is still more than 2X the 1.8% average rate for smartphones. The issue seems to be screen size rather than portability, since tablets score a 3.8% conversion rate, while other devices, such as smart watches, reach just 0.1%.

Brands can boost their conversion rates with referral programs, which average 5.4%, and by smart use of email promotions, which provide a 5.2% conversion rate.

Get e-Commerce conversion rate data by traffic source, product type and country in this infographic from Endertech.