Clicks-per-open rate measures the percentage of people who clicked a link in your email after opening it. This metric shows how engaging your email content is to the reader. You can calculate it by dividing the total clicks by the total opens and multiplying by 100. A high clicks-per-open rate indicates that your email content and call-to-action are compelling. You should focus on clear links, engaging content, and strong calls-to-action to improve this rate. You should also ensure your links are visible and relevant. Testing different email designs helps in understanding what resonates with your audience.