Several key metrics can guide your spending decisions:
Open Rate: Indicates the percentage of recipients who open your emails. Click-Through Rate (CTR): Shows the percentage of recipients who click on links within your emails. Conversion Rate: Measures the percentage of recipients who take a desired action, such as making a purchase. ROI: Calculates the return on investment from your email marketing efforts. Unsubscribe Rate: The percentage of recipients who opt out of your email list, indicating potential issues with content or frequency.