Active geo-replication is a feature that lets you create a continuously synchronized readable secondary database for a primary database. The readable secondary database may be in the same Azure region as the primary, or, more commonly, in a different region. This kind of readable secondary database is also known as a geo-secondary or geo-replica.
https://learn.microsoft.com/en-us/azure/azure-sql/database/active-geo-replication-overview?source=recommendations&view=azuresql