For those not familiar with the term “Split Testing,” this refers to testing different marketing approaches to determine which strategy will return the biggest ROI. For example, let's say that you’re doing an email campaign, you could split test your subject verbiage. Example: “10 ways to sell more cars” is your split test A and “Who else want’s to sell more cars?” would be your split test B. You send out 500 emails with the A subject line and 500 with the B subject line, and then you…