As the “front door” for applications to access data, business logic, or functionality from backend services.
When using API Gateway, you can create RESTful APIs and WebSocket APIs to enable real-time bidirectional communication applications.
API Gateway supports containerized, serverless workloads, and web applications.

In a large information architecture with multiple information systems, if users access different systems separately, besides the risk of exposing too many interfaces to users, external users face overly fragmented API paths when scheduling.

At this time, an integrated interface is needed as the front door.
AWS has launched the API Gateway service to help developers easily build, publish, maintain, monitor, and protect APIs.