Which identity must a practitioner set when using a schema in the Real-Time Customer Profile?

The primary identity is crucial when using a schema in the Real-Time Customer Profile because it serves as the main identifier for a customer within the Adobe Real-Time Customer Data Platform (RTCDP). This identity allows for the aggregation of various data points and interactions related to that specific individual, facilitating personalized experiences and insights.

By defining a primary identity, the system can unify data from multiple sources, such as web interactions, CRM records, and offline touchpoints, creating a comprehensive profile that reflects the customer's journey. This holistic view is essential for effective segmentation, targeting, and optimizing marketing strategies.

In contrast, the secondary identity is used to link additional identifiers that support the primary identity but do not serve as the main reference point. Anonymous identity is relevant for visitors or users who have not logged in or are not known to the brand, while temporary identity often pertains to non-permanent data collection scenarios. These other identity types play their own roles but do not carry the primary function of establishing the core reference framework necessary for utilizing schemas effectively within the profile.