Why is AB Testing in Marketo important? As Marketo likes to say, “we’re marketers, not mind readers.”Emails and landing pages are key marketing components for any successful marketer to master. But how are we supposed to know which ones engage people the most? Nowadays, it’s also getting more and more difficult to grab and retain the attention of audiences. It’s vital, now more than ever, to be able to determine which versions of our marketing materials generate the best results. And A/B testing is a simple, inexpensive way to do just that.