What triggers the list detective during data import in Marketing Cloud?

The List Detective is a feature in Marketing Cloud that plays a critical role during the data import process, specifically in identifying and managing duplicates within a list based on a defined list model. When a data import is initiated, the List Detective evaluates the incoming records against the established criteria of the list model to determine if there are any potential duplicates or conflicts that need to be addressed.

This functionality is essential because it helps maintain the integrity of the subscriber data by ensuring that unique records are preserved and that duplicates do not enter the system. When the List Detective activates, it checks against the attributes specified in the list model to identify any discrepancies or overlaps, guiding users in effectively managing their subscriber lists.

While other concepts like Data Extensions and Subscriber Key matches are important in the overall framework of Marketing Cloud, they do not specifically trigger the List Detective in relation to data import processes. The focus here is on the list model, as it directly informs how the List Detective operates to maintain clean and effective subscriber data.