Email open rate is the percentage of people who open an email out of the total number of people who receive it. The open rate is a good way to measure how successful your email campaign is. If your email campaign has a low open rate, it means that people are not interested in the email and are not opening it. This can be due to a number of factors, such as the subject line, the content of the email, or the sender. If you have a high open rate, it means that people are opening your email and are interested in what you have to say. There are a number of ways to increase your open rate, such as using a catchy subject line, having interesting content, or sending your email to a targeted list of recipients.