Introduction OpenTelemetry is a powerful open-source observability framework that enables organizations to collect, process, and analyze telemetry data across distributed systems. Its standardized approach to gathering metrics, logs, and traces makes it easier to monitor performance and detect issues in real-time. This is particularly interesting for defining Service Level Objectives (SLOs) because it allows teams to set reliability targets based on end-user impact data from each part of the application. This makes OpenTelemetry a valuable foundation for building meaningful SLOs that reflect real user experience and help teams make smarter, faster decisions about reliability.