Post production is vital for several reasons. First, it allows you to measure the success of your campaigns. By analyzing metrics such as open rates, click-through rates, and conversion rates, you can understand how well your emails are performing. Secondly, it helps in identifying areas for improvement, whether itâs the subject line, email content, or call-to-action buttons. Lastly, it enables you to build a stronger relationship with your subscribers by continuously refining your approach based on their preferences and behavior.