Describe how you would implement monitoring and alerting for a distributed system.

Monitoring strategy: 1) CloudWatch for metrics and logs, 2) X-Ray for distributed tracing, 3) Custom metrics for business KPIs, 4) Structured logging with correlation IDs, 5) CloudWatch dashboards for visualization, 6) SNS for alerting, 7) PagerDuty integration for critical alerts, 8) Automated remediation with Lambda.