You can now tag your AWS Cloud Map namespaces and services through the AWS Command Line Interface (AWS CLI), AWS CloudFormation or the AWS Software Development Kit (AWS SDK). AWS Cloud Map is a cloud resource discovery service. Using AWS Cloud Map, you can define custom names for your application resources, such as Amazon ECS tasks, Amazon EC2 instances, Amazon S3 buckets, or any other cloud resource. Your application can then discover the location and metadata of cloud resources associated with these custom names via AWS SDK or by making authenticated API calls.
Source:: Amazon AWS