When you report on your emails, you will see both email opens and unique opens. This article explains the difference between them and how they relate to each other.
What are email opens?
Email opens are the total number of opens a campaign has had. Every time a contact opens the email is counted, so if the same contact opens it more than once, each open is included.
What are unique opens?
Unique opens are the number of different contacts who have opened the email. The same contact could open an email 10 times, but they would only appear as one unique open.
How do email opens and unique opens compare?
The number of email opens will always be greater than or equal to the number of unique opens. For example:

Want to know more about opens?
If you want to improve your open rate, learn more in our How to increase your open rate article.
If you want to know how opens triggered by security software are handled, learn more in our Non-Human Interaction: What is it and what's changing? article.
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