Open rate is the percentage of people who opened an email based on a specific time frame. For example, if you send out 100 emails and 50 are considered open, your open rate would be half of that total list size (50/100 = 0.50). This metric can help you determine which types of content get subscribers’ attention and how much they engage with your email campaigns.
This informative article provides insights on the top email marketing metrics you should know.