The product’s dashboard and flight recorder
After an aircraft takes off, instruments show the crew how it is performing while a flight recorder preserves detailed events for investigation. Live software also needs evidence about what is happening after release.
The running app produces telemetry on its servers and sometimes in users’ browsers or phones. Logs record events, such as a failed payment request, with details that help investigate. Metrics track numbers such as response time or error rate. Monitoring tools bring these signals together. Alerts notify people when a chosen condition needs attention.
Observability is the broader ability to understand a system’s internal state from the information it produces. A trace can show where one user request spent time across several services.
More data is not automatically more insight
An alert should be actionable. If a system sends constant warnings that nobody needs to act on, people learn to ignore them. Teams choose signals that reflect customer impact and service health, then provide enough context to investigate effectively. A low error rate can still hide a broken journey for one customer group, so teams combine technical signals with product and support evidence.