According to the Yesmail Interactive analysis of data from Q4 2014 and Q4 2013 to gauge how mobile is trending in terms of key metrics like click-to-open rate (CTO), desktop-to-mobile purchase ratio, average order value (AOV), and conversion rate. Mobile clicks now account for almost 40% of all email clicks, a 10% increase YoY This overview examines the use of smartphones and tablets, finding that purchasing has changed year-over-year (YoY,) and that responsive design impacts CTO on mobile devices. Mobile CTO has increased by over 20% YoY while Desktop CTO has increased by over 6% YoY. As mobile devices have become indispensable, marketers have started to effectively adjust to the mobile preference expressed by their consumers over the past few years; by incorporating responsive design in their emails, building adaptive landing pages, or optimizing the mobile path-to-purchase, the YoY data shows that, at minimum, marketers have set an intention to truly cater to their mobile audience. Get the full story at Media Post and download the "Email Design Lookbook 2015 Edition" at Yesmail (free registration)