Torrenting by its very nature is pretty risky. And while peer-to-peer sharing of big files is undeniably useful, you can leave yourself exposed to threats from bad actors.
Most VPN services are completely fine with you using BitTorrent or P2P services while using their products. None of our top-rated VPN services prohibit file sharing. Even the services that allow torrenting often have restrictions, however.
Among their many uses, torrenting VPNs ensure that your identity is anonymous when you download torrents and that all data shared or received by you is completely encrypted. That's the basic premise, but you can scroll down this page if you want more information on why using a VPN to torrent is a good idea.