It's essential to track the performance of your audience expansion efforts. Key metrics to monitor include:
Subscriber Growth Rate: Measure the rate at which your email list is growing. Open and Click-Through Rates: Track how many subscribers are engaging with your emails. Conversion Rate: Monitor the percentage of subscribers who take the desired action, such as making a purchase. Unsubscribe Rate: Keep an eye on how many people are opting out of your emails, as this can indicate issues with your content or frequency.