Description: Subscriptions in GraphQL refer to directives or behaviors specific to operations that allow clients to receive real-time updates about data. Unlike queries and mutations, which are request-response operations, subscriptions establish a persistent connection between the client and the server. This allows the server to proactively send data to the client when changes occur in the data state. Subscriptions are particularly useful in applications where information changes frequently, such as various real-time applications. The implementation of subscriptions in GraphQL is typically done through WebSockets, enabling efficient bidirectional communication. This feature not only enhances the user experience by providing instant updated information but also optimizes resource usage by preventing clients from making repetitive queries for updated data. In summary, subscriptions in GraphQL are a powerful tool for building interactive and dynamic applications that require constant communication between the client and server.
