GraphQL Federation is an architectural pattern that allows developers to create a single, unified GraphQL API by combining multiple smaller GraphQL APIs called Subgraphs. This modular approach enables teams to work independently on different parts of the overall schema, promoting faster development cycles and reducing conflicts. By exposing a unified GraphQL API to clients, Federation abstracts away the complexity of the underlying microservices, providing a seamless and coherent experience for API consumers. The federated approach curtails challenges associated with monolithic GraphQL APIs, such as complex merge processes and coordination delays, allowing updates and new functionalities to be integrated more swiftly. This enables teams to respond promptly to market changes and user feedback, ensuring that APIs remain robust and aligned with business objectives.