https://github.com/awsdocs/amazon-ec2-user-guide/tree/master/doc_source/monitoring_ec2.md
Exam Tips:
- Dashboards - Creates awesome dashboards to see what is happening with your AWS env.
- Alarms - Allows you to set Alarms that notify you when particluar thresholds are hit.
- Events - CloudWatch Events helps you to respond to state changes in your AWS resources.
- Logs - CloudWatch Logs helps you to aggregate, monitor, and store logs.