Explain the concept of distributed request tracking in microservices architecture.

Distributed tracing in a microservices architecture is a method of monitoring and analyzing the passage of requests through multiple services. Each request is assigned a unique identifier, which is passed between services, allowing for a complete picture of its path and processing time at each stage.

This helps identify bottlenecks, errors, and delays in complex distributed systems. Typically, special tools and standards such as OpenTracing or OpenTelemetry are used.

Example: a user request passes through an authentication service, then an order service, and a payment service. The distributed tracing system collects data on time and statuses at each step, enabling quick diagnosis of issues.