I'm new to SF and SFMC.
I would like to filter my Marketing Cloud Subscribers by using a Salesforce custom object.
Subscription__c is the object I would like to query and has a master-detail relationship to
Contact__c and another custom object
I would like to filter my data to different lists based on the
What would be the best method to do this on an automated process in Marketing Cloud to import this data and use the
Subscription[:contact] for my email lists?