How "Do not send notification if the customer has ordered later" option works?

How "Do not send notification if the customer has ordered later" option works?

If you don’t want to send 2 e-mails with Offers to the customer who has made, for instance, 2 orders during some period of time and you want just to send only 1 e-mail.

For instance, on the settings of email template you have indicated for the field Sending time after the order the value Through 7 days. The customer has made 1 order at first and then via 3 days the second one. If meanwhile you have marked the checkbox Do not send notification if the customer has ordered later, then to the customer will be sent 1 e-mail with Offers after 7 days from the moment of the 2nd order.