Discover what the global database is and for which communication activities it can be used.
What is the Global Database
The global database provides a "view" that includes all contacts present in the various databases, allowing actions to be carried out across all contacts (e.g., sending Christmas greetings or Black Friday promotions), regardless of their database of origin.
During the delivery phase, to avoid sending multiple identical messages to the same recipient, there is a default setting that limits sending to a single message per email address.