An Amazon Machine Image (AMI) provides the information required to launch an instance, which
is a virtual server in the cloud. You must specify a source AMI when you launch an instance.
You can launch multiple instances from a single AMI when you need multiple instances with
the same configuration. You can use different AMIs to launch instances when you need
instances with different configurations
EBS is the Elastic Block Store
ARN is the Amazon Resource Name which uniquely identifies AWS resources