Monitoring: ○ API Gateways can provide monitoring of service health, response times, and usage patterns across the system, enabling easy observability. ○ Example: Use Prometheus or Grafana to collect metrics from the gateway

Short answer: And monitor traffic, failures, and performance.

Real-world example (ShopNest)

ShopNest’s API Gateway routes /orders to the Order service and /payments to Payment—clients talk to one entry point.

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.