A region is a geographical area where the SMN service is deployed.
Each region comprises one or more availability zones (AZs) and is isolated from the other regions. Only AZs in the same region can communicate with each other through an internal network.
Public cloud data centers are distributed in many locations worldwide, such as North America, Europe, and Asia. You can use SMN in different regions. Provisioning SMN in the required region can better suit local users' requirements or comply with local laws and regulations.