Cloud Kicks has a primary data extension that contains the bulk of its subscriber base...

To ensure subscribers receive only one copy of the weekly email as intended, even if they are added to the primary data extension for multiple product notifications, the marketing associate should ensure that the option to de-duplicate by email address is selected during the email send process. This feature checks for and removes any duplicate email addresses within the send list, ensuring each subscriber receives only one copy of the email, regardless of how many times their email address appears in the data extension.