In this blog post, OpenTelemetry is explored as a unified framework for collecting, processing, and exporting observability data from distributed systems. It simplifies the configuration and deployment of OpenTelemetry agents for Lambda functions by providing automatic instrumentation and tracing capabilities. Serverless applications face challenges in observability due to ephemeral function lifespans and lack of persistent storage or network resources. OpenTelemetry addresses these challenges with a lightweight and flexible solution, allowing developers to add minimal code changes to instrument common libraries and frameworks. The blog post focuses on the automatic instrumentation of an AWS Lambda function using Node.js, highlighting key libraries and APIs, such as `@opentelemetry/instrumentation-aws-lambda`, `@opentelemetry/sdk-trace-node`, and `OTLPTraceExporter`. By following the steps outlined in this guide, developers can gain valuable insights into the performance, behavior, and dependencies of their Lambda functions, enhancing observability with OpenTelemetry SDKs and exporting traces to New Relic.