Who benefits from distributed tracing, and how does the benefit differ per role?

Developers use traces to find and reproduce performance problems, operations teams to handle incidents faster and understand dependencies, and the business gets faster resolution, higher availability and a better user experience.

• For developers — locate performance problems in a concrete request, reproduce errors with the exact path and parameters that produced them, and perform root-cause analysis instead of adding print statements.
• For operations teams — faster incident handling (the failing hop is visible rather than inferred), an accurate picture of which services depend on which, and impact analysis: if this service degrades, which user journeys are affected?
• For the business — problems resolved sooner, higher availability, and a better user experience, which is the only one of the three that customers ever perceive.

The through-line is that all three benefits come from the same data. Tracing is unusual in that a single instrumentation effort serves debugging, operations and business reporting at once — which is the main argument for doing it properly rather than per-team.