Get Your Privacy
The encrypted tunnel also prevents your ISP from collecting your private data. This can be useful from a privacy perspective, but it's also handy if you want to prevent your torrent traffic from being noticed.
From the VPN server, your data exits onto the internet. Because your data appears to be coming from the VPN server, anyone watching your traffic will get in troubles if they want to discern your true location. In fact, even if they capture your IP address, they'd receive the VPN server's address instead of yours.