Publication List and Auto-Suppression List can be used to control what content is available to certain users and business units based on their preferences and send volume. A Publication List allows subscribers to opt in or out of different types of communications, while an Auto-Suppression List automatically excludes subscribers from receiving certain messages based on criteria such as frequency or content category. Reference: https://help.salesforce.com/articleView?id=sf.mc_es_publication_lists.htm&type=5 https://help.salesforce.com/articleView?id=sf.mc_es_auto_suppression_lists.htm&type=5