AD0-E556: Adobe Certified Master - Adobe Marketo Engage Architect

Because a customer can own multiple instances of the same product or service, the underlying data is a one-to-many (or many-to-many) relationship, which cannot be represented reliably using a fixed number of fields on the Person record — any field-based approach caps out once a customer exceeds the allotted field count or holds duplicate products. Marketo Custom Objects are purpose-built to model this kind of relationship: separate "Products" and "Services" Custom Objects can be linked to the Person record via a link field, letting each customer have an unlimited number of associated product/service records with their own attributes (e.g., performance snapshot data). Email Scripting (Velocity) tokens can then pull from these Custom Objects at send time to dynamically generate personalized content for each recipient's actual holdings, regardless of how many products or duplicate products they own. This is the standard, scalable pattern described in Adobe's Marketo Engage documentation on Custom Objects and Email Scripting for building relationship-based, one-to-many personalized content.