BitTorrent is a peer-to-peer protocol used for distributing large files over the Internet. It allows users to upload portions of a file they are downloading, enabling higher download speeds. The protocol is efficient because users upload portions of a file while still downloading it. While it provides high-speed transfers, BitTorrent requires multiple ports that may be blocked by firewalls, and its use of peer-to-peer file sharing has raised legal issues around copyright.
