The last step of your email newsletter strategy is to measure and optimize your results. You need to track and analyze various metrics, such as open rates, click-through rates, bounce rates, conversions, unsubscribes, or feedback. These metrics will help you understand how your email newsletter is performing, what is working well, and what needs improvement. You can use different tools, such as Google Analytics, Mailchimp, or HubSpot, to monitor and report your results. You should also test and experiment with different elements of your email newsletter, such as subject lines, headlines, content, format, style, frequency, or timing, and see what generates the best response from your readers. By measuring and optimizing your results, you can improve your email newsletter strategy and increase your brand awareness and loyalty.