OpenTelemetry (OTel) is an open-source, vendor-neutral project providing standardized metrics, traces, and logs for application and infrastructure observability. This session introduces OpenTelemetry's core concepts and demonstrates how it can be used to gain real-time visibility into infrastructure performance. Attendees will learn about integrating OTel with popular monitoring backends, setting up infrastructure instrumentation, and extracting actionable insights for performance optimization and troubleshooting.