Simple, you replace your torrent client with it. Instead of opening a torrent file in QBittorrent or whatever, you go to the “torrents” section and paste the magnet link/open your torrent file there. Then select “convert” and then you can download the torrent directly from their servers. It’s kind of like a seedbox that everyone shares, so that you don’t have to wait for seeds so long as at least one person has added the file to Debrid before.