Clues from a running app
An online shop can send data about slow pages, failed payments, and which features shoppers use. This is telemetry. It can come from servers, browsers, or phones.
Metrics are numbers such as response time. Logs record events such as errors. Traces follow a request through several services. Teams use these clues for monitoring and usage analysis.
Choose what to collect
Collecting too much data raises costs and privacy risks. Teams decide what they need to know, avoid recording private details, limit who can see the data, and delete it when no longer needed.