See the bootcamp in Youtube Trailhead: Marketing Cloud Contact Management Marketing Cloud Data Management Marketing Cloud Security Personalized Email Marketing Apuntes: Contact Builder is a Marketing Cloud app which lets you access, manage, organize, link, and view contact data from all Marketing Cloud applications and channels. I s useful for decision splits and when you need to move contacts through specific paths in a journey, or as a way to inject a contact into a journey itself. Contact Builder has several tools to help manage contact data for use in building 1:1 relationships: Contacts Configuration Determine how Contact Builder processes imported contact information. Data Designer Define information about your contacts and relate that data directly to the contact record by linking data extensions. Data Extensions Create and manage the data extensions that hold contact information. Imports. Create the processes that move contact information int...