Push real-time updates to clients whenever something important changes on the server.
Subscriptions allow a GraphQL server to send updates to clients when specific events occur. Instead of repeatedly asking the server whether something changed, a client can subscribe to an event and receive new data when that event happens.
Subscriptions are useful for features such as chat messages, notifications, live dashboards, and collaborative applications. They typically require a persistent connection and introduce additional concerns around connection management, scaling, and authentication.
What you'll walk away knowing