AWS monitoring service that collects and tracks metrics, logs, and events from your applications and infrastructure. Like a security camera system that watches everything and alerts you when something unusual happens.
CloudWatch monitors CPU usage on EC2 instances and automatically sends alerts when usage exceeds 80%.
All provide metrics, logs, alerting, and dashboards for cloud resources and applications. AWS CloudWatch is the native AWS option; Azure Monitor and Google Cloud Observability are the closest equivalents; OCI uses separate Monitoring and Logging services that integrate for alerts and dashboards.