Open Rate is a metric used in email marketing to measure the number of recipients who have opened an email message out of the total number of recipients who received it. The Open Rate can be calculated by dividing the number of unique opens by the number of emails delivered, multiplied by 100. It is typically expressed as a percentage and serves as an indicator of how successful an email campaign has been.
Formula: Open rate = (# of unique opens) รท (total email recipients) x 100
Open Rate is closely related to another metric called Click-Through Rate (CTR). While Open Rate measures the number of people who open your email, CTR focuses on those who take action after opening your message, such as clicking on a link or signing up for a product. However, while CTR is more precise in its measurement, it requires more effort from users than just opening an email and is therefore considered less reliable than Open Rate.
