Northern Trail Outfitters wants to set up a welcome journey that leverages customer data across...

To effectively set up a welcome journey leveraging customer data across multiple data extensions in Contact Builder:

Single Attribute Group: Create one cohesive Attribute Group that interlinks Customers to Contacts, Orders to Customers, and Products to Orders. This setup ensures a streamlined data flow and relational integrity, crucial for targeting and personalization within the journey.

Data Relationships: This configuration facilitates the use of data across different stages of customer interaction—from acquisition through orders to product preferences—enabling more personalized journey experiences.