+**Observability** is the measure of how well a system's internal [State](/wiki/state) can be inferred from its external outputs. It's about knowing what's happening inside, relying on gathered [Telemetry](/wiki/telemetry) like metrics, logs, and traces to understand complex behaviors and unseen issues.
+## See also
+- [Monitoring](/wiki/monitoring)
+- [Debugging](/wiki/debugging)
+- [Distributed Systems](/wiki/distributed_systems)
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