WebSocket is a protocol that enables bidirectional, real-time communication between nodes, allowing for efficient and interactive communication between clients and servers. Here are some key aspects of WebSocket:

1. _Bi-directional_: WebSocket enables both clients and servers to initiate communication, allowing for real-time updates and feedback.

2. _Real-time_: WebSocket enables real-time communication, making it ideal for applications requiring instant updates and responses.

3. _Persistent Connection_: WebSocket establishes a persistent connection between clients and servers, reducing overhead and latency.

4. _Low-latency_: WebSocket enables low-latency communication, making it suitable for applications requiring fast and efficient data transfer.

5. _Scalable_: WebSocket is designed to handle a large number of concurrent connections, making it suitable for large-scale applications.

WebSocket is commonly used for:

1. Live updates and notifications

2. Real-time data streaming

3. Interactive applications (e.g., gaming, chat apps)

4. IoT (Internet of Things) applications

5. Blockchain networks (e.g., real-time transaction updates)

In blockchain networks, WebSocket is used for:

1. Real-time transaction updates

2. Node-to-node communication

3. Smart contract interactions

4. Decentralized applications (dApps)

5. Real-time data streaming (e.g., blockchain analytics)

WebSocket enables efficient and interactive communication, making it a popular choice for applications requiring real-time updates and feedback.