Automating Elasticity
AWS Whitepaper

Tagging Resources

Tagging resources gives you visibility and control over cloud IT costs down to seconds and pennies, by team and application. Tagging lets you assign custom metadata to instances, images, and other resources. For example, you can categorize resources by owner, purpose, or environment, which helps you organize them and assign cost accountability.

When resources are accurately tagged, automation tools can identify key characteristics of those resources needed to manage elasticity. For example, many customers run automated start/stop scripts that turn off development environments during non-business hours to reduce costs. In this scenario, Amazon Elastic Compute Cloud (Amazon EC2) instance tags provide a simple way to identify development instances that should keep running.