Monitoring & Observability

You cannot improve what you cannot see. Monitoring and observability give you the eyes and ears you need to understand how your application behaves in production — from catching errors the moment they happen to understanding real user experiences at scale. This topic covers the essential tools and practices that turn your production environment from a black box into a transparent, well-understood system.

1. 1
   Error Tracking

   Capture, group, and alert on production errors with tools like Sentry, Bugsnag, and Rollbar. Learn about source maps, alert fatigue, and error budgets.
2. 2
   Uptime Monitoring

   Keep your services available with uptime checks, status pages, and incident response. Understand SLAs and what 99.9% uptime really means.
3. 3
   Analytics and Real User Monitoring

   Measure real user experiences with RUM, understand Core Web Vitals in the field, and balance analytics with user privacy.
4. 4
   Logging Best Practices

   Structured logging, log levels, correlation IDs, centralized log management, and what you should never write to a log file.