CloudWatch composite alarms can provide an overall state for a grouping of resources like an application, AWS Region, or Availability Zone. This helps you focus on a smaller number of alarm signals which aggregate impact from all parts of your system or application. If an application issue affects several resources in the application, you will receive a single alarm notification for the entire application instead of one for each affected service component or resource. For example, say you deploy various devices into the homes of your customers. If a software deployment causes issues with a specific device model, operators may end up spending more time managing alarms firing off multiple devices, rather than troubleshooting and fixing the underlying issue for that model. With composite alarms, you can configure a condition for each device model in minutes so that you get only one alarm, and your operators can quickly deal with the root cause.

