With Azure Resource Manager, you can:

• Manage your infrastructure through declarative templates rather than scripts. A Resource Manager template is a JSON file that defines what you want to deploy to Azure.
• Deploy, manage, and monitor all the resources for your solution as a group, rather than handling these resources individually.
• Re-deploy your solution throughout the development life-cycle and have confidence your resources are deployed in a consistent state.
• Define the dependencies between resources, so they’re deployed in the correct order.
• Apply access control to all services because RBAC is natively integrated into the management platform.
• Apply tags to resources to logically organize all the resources in your subscription.
• Clarify your organization’s billing by viewing costs for a group of resources that share the same tag.