To use a simple segmentation strategy for identifying subscribers for their emails, Northern Trail Outfitters should use list model and groups in Single Send Journeys. List model is a method of storing subscriber information in lists rather than data extensions. Groups are segments of subscribers based on list attributes or behaviors. Single Send Journeys are journeys that allow marketers to send one-time messages to lists or groups using Journey Builder features. References:
https://help.salesforce.com/s/articleView?id=sf.mc_es_list_model.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.mc_es_groups.htm&type=5https://help.salesforce.com/s/articleV