IP, Privacy & Security
What Is a VPN and How Does It Work?
A VPN creates a private, encrypted tunnel between your device and a remote server, changing what the internet sees and shielding your traffic in transit.
The tunnel concept
A Virtual Private Network establishes an encrypted "tunnel" from your device to a VPN server. Everything you send goes through this tunnel: your traffic is encrypted on your device, travels to the VPN server, and only there exits to the wider internet. Replies come back the same way.
Two things a VPN changes
- Your visible IP address: websites see the VPN server's address and its location, not yours.
- Encryption in transit: anyone between you and the VPN server — your ISP, a public Wi-Fi operator, a snoop on the same network — sees only scrambled data, not what you're doing.
What a VPN is good for
- Protecting traffic on untrusted networks like café or airport Wi-Fi.
- Hiding your real IP address and rough location from the sites you visit.
- Preventing your ISP from seeing (and potentially logging or selling) which sites you browse.
- Accessing region-restricted content by appearing to be elsewhere.
What a VPN does not do
A VPN is not total anonymity or security. It doesn't stop websites from tracking you via cookies and logins, doesn't protect you from malware, and doesn't make you invisible. And it shifts trust: your ISP can no longer see your traffic, but the VPN provider now can. That's why a provider's honesty and no-logs policy matter enormously.
Choosing one
Look for a reputable provider with a clear, ideally audited no-logs policy, strong modern encryption, and a jurisdiction you're comfortable with. Free VPNs deserve extra caution — running servers costs money, and if you're not paying, it's worth asking how the service is funded. A VPN is a useful privacy tool, but only as trustworthy as the company behind it.