Why would you want to test and compare the content of a mail? Well, it is worth testing this if for instance you are in doubt as to whether your Christmas Campaign should lead with an image of Santa Claus, a Snowman or Elsa from Frozen. Similarly, you might want to see if the placement of your content affects the responses, engagement and click-throughs you see from your campaign - does having certain products in certain positions, or different headlines, CTAs or button placements or any number of other variations inside the email content itself have a major impact on the effectiveness of your campaign?
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