What action should be taken to enhance customer information visibility using Contact Builder?

The recommended action to enhance customer information visibility using Contact Builder is to combine each individual's channel contact information under one record. This approach ensures that all relevant contact details for a customer are consolidated into a single, comprehensive profile. By unifying data from various channels—such as email, social media, and SMS—marketers gain a holistic view of customer interactions and behaviors. This centralized repository allows for more personalized communication and targeted marketing efforts, ultimately leading to improved customer engagement and satisfaction.

Combining channel contact information provides a clearer picture of who the customer is and how they interact with the brand across different platforms. This enhances segmentation and allows marketers to create more effective campaigns that resonate with the customer’s preferences and tendencies.

While the other options involve methods of data handling, they don't necessarily achieve the same level of visibility or integration. For instance, importing data manually or using a dashboard may lead to fragmented information, whereas using Marketing Cloud Connect involves a direct integration but does not specifically address the unification of all channel contact information under one record. Thus, merging individual channel details into a cohesive profile is the most effective strategy for achieving enhanced visibility of customer information in Contact Builder.