BitTorrent is a protocol which allows the sharing of large amounts of data over the Internet.
One of the most well-known and common protocols for transferring large files, like those containing movies, BitTorrent is defined as a peer-to-peer (P2P) communications protocol.
In order to use BitTorrent, users must install a computer program, known as a BitTorrent Client, on their Internet-connected computer. There are many different Clients available, such as μTorrent, Xunlei, Transmission, qBittorrent, Vuze, Deluge, BitComet and Tixati.
A BitTorrent Tracker, which is a server facilitating communication between peers, gives users a list of available files to transfer and allows the user to find other peers, known as seeds.