Lag and desynchronization can ruin the player experience, especially in competitive games where milliseconds matter. We're implementing real-time monitoring to detect and address synchronization issues before they become widespread. Our approach includes tracking client-server delta, identifying network bottlenecks, monitoring server tick rates, and measuring input-to-action latency. The goal is to catch performance degradation early and automatically trigger optimization strategies like dynamic quality adjustment, server region switching, or load redistribution. However, the challenge is determining which interventions to apply and when, without disrupting active gameplay. What metrics do you monitor to identify synchronization problems? How do you handle edge cases like players on unstable connections or those playing across regions? Do you implement client-side prediction with server reconciliation, and if so, how do you measure its effectiveness? What automated responses have worked well for your team?