Region: select a region close to the resource for client deployment.
Standard Edition: does not support multi-AZ deployment.
Pro Edition: if the current region supports multi-AZ deployment, you can select up to 2 AZs for deployment. For more information on multi-AZ deployment, please see Multi-AZ Deployment.
Product Specification: select a model based on the peak bandwidth and disk capacity.
Message Retention: select a value between 24 and 2160 hours. When the disk capacity is insufficient (i.e., the disk utilization reaches 90%), old messages will be deleted in advance to ensure the service availability.