You have an Azure subscription that contains a resource group named RG1.

https://learn.microsoft.com/en-us/powershell/module/az.resources/new-azresourcegroupdeployment?view=azps-9.3.0#-resourcegroupname

Specifies the name of the resource group to deploy.

https://learn.microsoft.com/en-us/powershell/module/az.resources/new-azresourcegroupdeployment?view=azps-9.3.0#-mode

Specifies the deployment mode. The acceptable values for this parameter are:

-Complete: In complete mode, Resource Manager deletes resources that exist in the resource group but are not specified in the template.

- Incremental: In incremental mode, Resource Manager leaves unchanged resources that exist in the resource group but are not specified in the template.