Rsync is a powerful file synchronization tool commonly used in computing. It allows users to efficiently transfer and synchronize files between different locations, whether on the same machine or across a network. By only copying the differences between the source and destination files, Rsync minimizes data transfer, making it faster and more efficient than traditional methods. This tool is particularly useful for backups and mirroring data, as it can preserve file permissions, timestamps, and symbolic links. Rsync is widely available on various operating systems, including Linux, macOS, and Windows, making it a versatile choice for users needing reliable file management.