👉 Newsletter math is a method of summarizing and analyzing subscriber data to provide insights into reader behavior, preferences, and engagement. It involves calculating key metrics such as open rates, click-through rates, conversion rates, and subscriber growth or churn. By tracking these metrics over time, newsletter creators can identify trends, optimize content strategies, and tailor their messaging to better meet the interests of their audience. This data-driven approach helps in refining email campaigns, improving subscriber retention, and ultimately increasing the effectiveness of the newsletter.