Email marketing, to a large extent, is driven by data. Most email marketers love a good A/B test and pour over their campaigns stats after a send. Hopefully, you are using Email Analytics to track your campaigns. If so, how are you using the data you get from Email Analytics to improve your campaigns?

As a designer, I'm not the best when it comes to putting data to work—so I'd love to hear how others are using EA. What do you look at in your Email Analytics reports and how does that information influence the design and strategy behind your campaigns?