Application Performance Management (APM) tools like New Relic and error monitoring solutions such as Rollbar serve complementary roles in managing application performance and error tracking. While New Relic excels at providing high-level infrastructure and performance monitoring, identifying when and where problems occur, Rollbar enhances this by offering detailed contextual information that helps diagnose why errors happen, who is affected, and how to resolve them efficiently. Rollbar provides features like live error viewing, detailed error analytics, custom error grouping, and extended data retention, which allow for faster debugging and proactive error management. Additionally, Rollbar's integration with Git repositories and its ability to map errors to specific code deployments give developers direct insights into the root causes of issues. By using both tools in tandem, organizations can achieve comprehensive monitoring and management of both application performance and error resolution, optimizing customer experiences and operational efficiency.