If you have never heard the term “customer segmentation,” it’s the practice of grouping your existing customers (and email subscribers) together based on criteria that you define. Examples of this include the amount of money they’ve spent, the number of orders they’ve placed, where they’re located, or how they’ve interacted with your brand in the past (i.e., opened an email or clicked on an email). By grouping these customers/subscribers together based on common characteristics, it’s easier to personalize marketing to that specific audience, which, in turn, will lead to greater revenue growth.