OpenTelemetry (OTEL) is an open-source observability platform under the Cloud Native Computing Foundation (CNCF) designed to provide a standardized, vendor-agnostic method for instrumenting, collecting, and exporting telemetry data, including traces, logs, and metrics, across various programming languages, platforms, and cloud environments. Formed by the merger of OpenTracing and OpenCensus in 2019, OpenTelemetry has rapidly gained traction, becoming the second most active CNCF project after Kubernetes. It allows organizations to reduce the number of tools needed for telemetry data management, with major cloud vendors like AWS and Microsoft Azure offering their own distributions. A case study involving Logz.io demonstrates how OpenTelemetry can be used to collect and analyze telemetry data through client libraries and the OpenTelemetry Collector, which can receive and export data using multiple protocols. By adopting OpenTelemetry, organizations can automate tasks, minimize human errors, and ensure data is in a standard format compatible with various third-party applications and services, thereby enhancing their troubleshooting efficiency and application performance monitoring.