Smartphones and tablets drove 20.6% of e-commerce traffic during the fourth quarter of 2012, according to Monetate's Q4 2012 quarterly e-commerce report. PCs delivered the highest conversion rates at 4.45%, followed closely by tablets at 3.98%. Smartphones lagged at a 1.21% conversion rate. Smartphones however led in average order value, at $113.95. Tablets and PCs followed at $104.30 and $98.72 AOV respectively.