Unicast is a communication method in networking where data is sent from one sender to one specific receiver. This means that the information is directed to a single destination, ensuring that only that particular device receives the data. Unicast is commonly used in various applications, such as video streaming and online gaming, where a direct connection between the sender and receiver is essential for performance. In contrast to other methods like Broadcast or Multicast, which send data to multiple devices, unicast focuses on one-to-one communication. This approach can lead to more efficient use of bandwidth when the data is only needed by a single recipient, making it a fundamental concept in computer networking.