Tags

A tag is a label that you assign to an AWS resource. Each tag consists of a key and an optional value, both of which you define.
Tags enable you to categorize your AWS resources in different ways, for example, by purpose, owner, or environment.
Resource tags can be implemented to have attribute-based control (ABAC). IAM policies can be created to allow operations based on the tags for the resource.
Tags can be used to organize your AWS bill to reflect your own cost structure.