Improved Observability: With tracing, you can understand system behavior under load and identify which parts of the system need optimization. Example: Jaeger can trace a user login request from the front-end, through the

Short answer: uthentication service, and to the database query, allowing you to spot any delays in the flow.

Real-world example (ShopNest)

ShopNest splits Catalog, Cart, Order, and Payment into services so teams can deploy catalog changes without redeploying payments.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.