Edit: Also, Real-Debrid if you want to directly download any torrent instantly at your connection's maximum bandwidth (up to 1Gbps) without having to wait for seeds. But this one costs money. (It's worth it, though, especially if you're downloading a lot of 50GB+ AAA games like I am.)
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.