"API Gateway" facilitates structured communication between clients and backend services, acting as a single entry point for managing API requests. It handles tasks such as authentication, routing, and load balancing, ensuring that requests are directed efficiently to the correct service. This architecture supports microservices by simplifying the management of service interactions and enabling performance monitoring. API Gateways enhance security by providing a consistent method for enforcing policies and throttling requests. Additionally, they aid in the creation of scalable and maintainable systems, as developers can manage multiple APIs without individual configurations.