SyncTunes is used to transfer songs from an iTunes library on one computer to another one, or from your iPod. This is most often done to back songs up, transfer songs to a new computer, transfer music stored on multiple computers to an iPod that is managed by one computer, or to restore music from your iPod. iSyncTunes finds all of your music automatically and allows you to directly add files to iTunes.
The discovery feature lets you transfer songs without having to know the IP address of the source computer. You can transfer songs between computers connected to your home network or the Internet, or you can transfer songs to a transfer library on a removable disk if your computers are not connected to the network.