An IP address is a necessary part of connecting to the internet. It’s a unique number linked to all of your online activity — including your device information, location, and more. This unique number provides a way for advertisers, hackers, and authorities to track you online, gather and sell your personal information, or restrict your access to online content.. 通过 PIA VPN，您可隐藏您的 IP 地址，提升匿名性。