Event
Any change of state that has significance for the management of a configuration item or IT service. Events are typically notifications created by an IT service, CI, or monitoring tool.
Impact
Events are the raw data of operations. Filtering events to find the "signal in the noise" is critical for preventing alert fatigue.
Weinto take
We design Event-Driven Architectures. Events shouldn't just be logs; they should be triggers. A "High CPU" event shouldn't just email a sysadmin; it should trigger a serverless function to scale out the cluster. We turn events into automated actions.