Email marketing campaigns have taken a lot of flak over the years, but they remain one of the most resilient advertising methods. The bottleneck that invariably occurs with email campaigns is the click-open rate.

The click-open ratio is an essential metric in determining how engaging your content is and whether you could do more to drive readers to your content. Low click-open rates might even suggest that you're annoying your recipients. If you start losing subscribers, it's a clear sign that you're doing something wrong