Debug errors in Lambda functions often require combing through logs and searching for relevant terms, but using Sentry can provide detailed error stack traces and debugging context. To instrument a Node function with Sentry, developers need to create a dummy function, add the Sentry package to their Node folder, initialize Sentry in the Lambda function, and wrap their handler. This provides visibility into errors from Lambda functions, including detailed stack traces, function context, and deep links to CloudWatch logs. With customizations such as capturing timeout warnings and adding breadcrumbs, developers can quickly identify issues, reproduce them in their local environment, and get to the root cause of problems.