# Product Overview

API Gateway is a service for controlling and distributing network traffic. By combining other computing resources, it achieves secure control, forwarding, and sharing of network traffic.

* Through App authentication and App authorization, set traffic quotas to reduce API exposure risk.
* Provide API group definition, API specification, environment definition and other API lifecycle management functions. Enhance API management controllability and accelerate API iteration efficiency.
* Provide API authorization to improve API reuse and help PAAS users provide their custom APIs to developers.