A marketing associate at Cloud Kicks notices that only half of the targeted recipients of...

After checking the Subscriber Status, the associate should check the Subscriber Key next. The Subscriber Key is a unique identifier for each subscriber in the All Subscribers list, which can help identify issues related to a specific recipient's email delivery. It is especially useful in troubleshooting scenarios where an email has not been successfully received, as it allows the associate to verify the specific subscriber's record and investigate potential causes for the delivery issue.