What is a Bit Torrent and what is it used for?

Answer 1

It is a means of transferring files over a network to a large number of people while sharing the bandwidth load.

Each person downloading the file is also uploading it to other users, so that hundreds (or more) of users can be downloading the data (which could be a huge file, such as a Linux install DVD image) without overloading the server belonging to the provider of the original file.

See http://en.wikipedia.org/wiki/BitTorrent for more details.

Answer 2

Just as the first guy said. Bit torrent is a site that provides you with small downlandable files called torrents. You use these files in a client like bit torrent, bit tornado or utorrent, to download whatever you want. You are uploading as you download or after you finished downloading. This is what person number one is talking about in detail.

there are other sites like isohunt or torrentspy that do the same thing and offer more torrents