ARM templates are JSON files that define the resources you need to deploy for your solution. Using ARM templates, you can deploy, manage, and monitor all the resources for your solution as a group, rather than handling them individually. Templates allow for the deployment of multiple resources in a correct sequence and are reusable for consistent deployment scenarios. Azure CLI scripts, while they can automate deployment, do not define the infrastructure in a template form. Resource groups are a way to organize resources but do not themselves define deployment templates. Similarly, Azure Automation enables the automation of cloud management tasks but does not use JSON templates to define the deployment and management of resources.