Several factors contribute to inconsistent performance in email marketing:
1. Audience Segmentation: Not all subscribers are the same. If your email list is not properly segmented, your message may not resonate with a large portion of your audience. 2. Email Content: Variations in the quality, relevance, and personalization of your email content can result in different engagement levels. 3. Timing: Sending emails at different times of the day or week can significantly affect open and click rates. 4. Subject Lines: The effectiveness of your email subject lines can vary, impacting your open rates. 5. Deliverability Issues: Emails landing in spam folders or not being delivered at all can lead to inconsistent performance.