OpenTelemetry is a set of tools, APIs, and SDKs designed for instrumenting, collecting, and exporting telemetry data (metrics, logs, traces) to enhance software performance analysis. The project is highly active within the Cloud Native Computing Foundation (CNCF) and is widely adopted across major cloud vendors and service providers. It features a single library per language for instrumentation and supports various data formats and processing techniques to standardize and streamline observability.