The metric to measure how fast an email list is growing. Calculated by taking the number of new subscribers in a defined period (often a month or a quarter), subtracting the number of churned subscribers in that period, then dividing by the total number of email addresses on a list at the end of that period. A way to see whether list popularity is growing, and how fast new subscribers are outpacing churned subscribers.

The metric to measure how fast an email list is growing. Calculated by taking the number of new subscribers in a defined period (often a month or a quarter), subtracting the number of churned subscribers in that period, then dividing by the total number of email addresses on a list at the end of that period. A way to see whether list popularity is growing, and how fast new subscribers are outpacing churned subscribers.