Historical Root-Cause Analysis
Deep-dive investigation tools, even if you've restarted the server. Includes security investigation related reporting (eg breakdown by user session/IP/etc)
Identify problem 'hot-spots' and focus engineering effort to improve your application (refactoring tasks). Determine the cause of system failure and learn how to prevent such failures from recurring in the future.
Level the playing field through transparency allowing PM's and technical teams to review and understand the same data. Technical teams can further deep-dive into the details to answer "WHY".
SLA Monitoring & Reporting
Measuring and maintain high standards through continual quality assurance.