It is impossible to know with certainty what is happening inside a remote or distributed system, even if they are running on a local machine. Telemetry is precisely what provides all the information about the internal processes. This data can take the form of logs, metrics, and Disturbed Traces.
In this article, I will explain all of the forms separately. I will also explain the benefits of OpenTelemetry protocol and how you can configure telemetry flexibly.