Tracking the right metrics in Argo CD ensures better visibility and performance. Key metrics include sync status, deployment duration, resource health, and application drift frequency. Monitoring the number of failed syncs or rollbacks helps identify potential configuration issues early. Cluster resource usage (CPU and memory) during deployments is also valuable for capacity planning. Using Prometheus, you can expose and visualize these metrics in Grafana dashboards. Observing these KPIs helps teams fine-tune automation, improve reliability, and maintain smoother operations in large Kubernetes environments.