IP Multicast is a method used in computer networking to efficiently send data from one source to multiple destinations simultaneously. Instead of sending individual copies of the same data to each recipient, multicast allows the sender to transmit a single stream of data that can be received by multiple users who are interested in that information. This technique is particularly useful for applications like live video streaming or online gaming, where many users want to receive the same content at the same time. By using multicast, network resources are conserved, reducing bandwidth usage and improving overall performance.