A customer complains to Cloud Kicks (CK) that they missed the seasonal sale email alerts.

The "All Subscribers" list in Email Studio is the centralized location within Salesforce Marketing Cloud where the status of each subscriber is maintained. This list includes details such as the subscriber's email address, status (Active, Unsubscribed, Bounced, etc.), and other relevant subscriber information. If a customer complains about not receiving emails, checking their status in the "All Subscribers" list can provide insights into whether they have unsubscribed or if there is another issue affecting their receipt of communications.