A torrent file is like an invite to a potluck. You arrive and say “hey guys I’ve arrived, what’s for dinner?” and everyone gives you a bit of the food they have. Eventually you’ve got a full meal and you can eat.
Those people are seeders and are giving you parts of a file to download from their own copy of the file. You’re a leecher who’s downloading the file. The file just begins the process of you connecting to the network and downloading from seeders.
The best part is that, unlike a potluck, you’re just copying the file instead of taking the food.
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