Open Rate is the percentage of recipients who open an email out of the total number of emails delivered. It’s a key metric in email marketing that helps gauge subject line effectiveness, sender reputation, and audience engagement.
While Apple Mail Privacy Protection and similar features have made open rate data less reliable, it’s still useful when interpreted alongside click-through and conversion data.
Example:
If you send 1,000 emails and 250 are opened, your open rate is 25%.