When building modern web applications, it is increasingly important to be able to handle real-time data with an event-driven architecture to propagate messages to all connected clients instantly.
Several protocols are available, but WebSocket is arguably the most widely used as it is optimized for minimum overhead and low latency. The WebSocket protocol supports bidirectional, full-duplex communication between client and server over a persistent, single-socket connection. With a WebSocket connection, you can eliminate polling and push updates to a client as soon as an event occurs.