To identify the causes of inconsistent performance, you need to perform a thorough analysis:
1. A/B Testing: Run A/B tests on different elements such as subject lines, content, and send times to see what works best. 2. Analytics: Use your email marketing platform's analytics to track open rates, click-through rates, and conversions. 3. Feedback: Collect feedback from your audience to understand their preferences and pain points. 4. List Quality: Regularly clean your email list to remove inactive subscribers.