OpenTelemetry metrics provide a comprehensive approach to observing and measuring the performance of services at runtime by capturing numerical data such as request counts, error rates, and latency. These metrics utilize instruments like counters, gauges, and histograms to track various aspects of system performance, enabling DevOps teams to monitor trends, detect anomalies, and plan capacity effectively. When exported to platforms like Logz.io, OpenTelemetry metrics can be visualized and correlated with logs and traces, facilitating efficient root-cause analysis and reducing mean time to resolution (MTTR). Best practices for deploying OpenTelemetry metrics involve using appropriate instruments, controlling cardinality, following semantic conventions, and leveraging collectors to centralize data processing. By integrating with Logz.io, OpenTelemetry offers a unified, scalable solution for real-time performance monitoring, enhanced by AI-driven insights and collaboration tools to improve system resilience.