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OpenTelemetry (OTel) is an observability framework for monitoring, tracing, troubleshooting, and optimizing applications. OTel enables the collection of telemetry data from a deployed application stack.
## What is the NGINX Native OTel Module
The `ngx_otel_module` dynamic module enables NGINX Open-Source or NGINX Plus to send telemetry data to an OTel collector. It provides support for [W3C trace context](https://www.w3.org/TR/trace-context/) propagation, OTLP/gRPC trace exports and offers several benefits over exiting OTel modules, including:
The `ngx_otel_module` dynamic module enables NGINX Open Source or NGINX Plus to send telemetry data to an OTel collector. It provides support for [W3C trace context](https://www.w3.org/TR/trace-context/) propagation, OpenTelemetry Protocol (OTLP)/gRPC trace exports and offers several benefits over exiting OTel modules, including:
### Better Performance ###
3rd-party OTel implementations reduce performance of request processing by as much as 50% when tracing is enabled. The NGINX Native module limits this impact to approximately 10-15%.