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Dashly.io explains which metrics are used in email marketing, which of them are more reliable. Open rate is the most obvious, but not the most reliable indicator. Open Rate allows you to find out how relevant the email is, what topics your subscribers are interested in, and when it is best to send emails. By tracking this indicator, you can also see how recognizable the sender is and whether it’s worth adding a company name to the email subject. The principle of “One email, one goal” should be followed.