Long Polling is a web communication technique used to enable real-time updates between a client and a server. In this method, the client sends a request to the server and keeps the connection open until the server has new information to send. Once the server responds, the client processes the data and immediately sends a new request, creating a continuous loop. This approach is different from traditional polling, where the client repeatedly asks the server for updates at regular intervals. Long Polling is more efficient because it reduces unnecessary requests and allows for quicker updates, making it suitable for applications like chat services and notifications.