CloudWatch in a central logging and metric collection service integrated with pretty much all major services in AWS, so there’s a good chance you are using it already, or will use it at some point. Further, it is very handy to search logs, set alarms, create event to trigger other events, etc.
Most organizations using public cloud are wasting thousands or even hundreds of thousands of dollars on cloud resources they’re not actually using. Even if you’re aware of overspend, you may not think you have the time or bandwidth to address the issue. With automation, integrating cost control into your daily processes can be straightforward.