The click-to-open rate, or CTO: What is it and why should you care? In short, it’s a sometimes used email reporting metric. Other metrics like open rate and click-through rate (CTR) are more common…but perhaps not as valuable. Although email marketers are used to seeing it mentioned, maybe even in their own email reporting, that doesn’t necessarily mean everyone knows what it is or why it matters. And we should, because this one piece of information […]