Which feature allows you to de-duplicate and append customer records effectively?

The correct answer is Contact Builder. This feature in Salesforce Marketing Cloud is specifically designed to manage and organize customer data, allowing for the effective de-duplication and appending of customer records. Contact Builder provides a user-friendly interface that enables marketers to visualize and manage their contact data.

With Contact Builder, you can define your contact model, which includes linking contacts across different data extensions and associating them with relevant attributes. This capability allows you to ensure that each unique customer is represented only once in your database, thereby minimizing duplicates. Furthermore, you can append additional data from related data extensions, enriching your customer profiles without losing the integrity of your data.

While other tools like Data Filters and Data Extensions are useful for managing data, they do not provide the same level of holistic contact management and deduplication capabilities that Contact Builder provides. Data Management Tools are comprehensive but focus more on overall data governance rather than specifically managing individual customer records in context.