It's common knowledge that newsletters are excellent marketing tools for eCommerce websites, yet some marketers swear them off forever. After going through all the intricacies of A/B testing and using automation tools to be sure newsletters go out at just the right time, they still don't see success. They may even master eye-catching Re: lines that reward them with high open rates, but still no increase in sales. Why do some marketers fail at newsletter marketing? It's because they haven't mastered content. read more