Updated March 2026 • 8 min read
Everything you need to know about VPNs — how they work, what they protect, and which one to choose. Written in plain English.
A VPN (Virtual Private Network) is a service that creates an encrypted tunnel between your device and the internet. All your internet traffic passes through this tunnel, protecting it from surveillance, hackers, and tracking.
Think of it like mailing a letter. Normally, your letter goes through the post office and anyone handling it could theoretically read it. A VPN is like putting that letter in a locked safe before mailing it — only you and the intended recipient have the key.
When you connect to a VPN:
The encryption is typically AES-256 — the same standard used by governments and militaries. It would take longer than the age of the universe to crack with current computing technology.
The IP address is your digital home address. Without a VPN, every website you visit logs your IP address. VPNs replace your real IP with the VPN server's IP, making you appear to be browsing from a different location.
Your internet service provider can see every website you visit. In the US, ISPs can legally sell your browsing history to advertisers. A VPN encrypts your traffic so your ISP can only see that you're connected to a VPN, not what you're doing.
Public WiFi at coffee shops, airports, and hotels is a prime target for "man-in-the-middle" attacks where hackers intercept unencrypted traffic. VPN encryption makes this data useless even if intercepted.
Netflix US has different content than Netflix UK or Japan. By connecting to a VPN server in another country, you appear to be browsing from there — unlocking different content libraries. This works for most streaming platforms including Netflix, Hulu, BBC iPlayer, and Disney+.
Advertisers track you across websites using your IP address, among other signals. A VPN replaces your IP, reducing the effectiveness of cross-site tracking (though it doesn't eliminate it — see next section).
In countries with authoritarian internet censorship (China, Russia, Iran), VPNs allow access to blocked websites and prevent government monitoring of internet activity.
VPNs are powerful but not magic. They do not:
| Use Case | Need VPN? | Recommended VPN |
|---|---|---|
| Streaming Netflix from abroad | Yes — essential | NordVPN |
| Public WiFi regularly | Yes — strongly recommended | Surfshark |
| General privacy from ISP | Yes — recommended | NordVPN |
| Journalists/activists | Yes — critical | ProtonVPN or Mullvad |
| Torrenting | Yes — important | PIA |
| Gaming | Optional (may increase ping) | NordVPN |
| Basic home browsing | Optional but recommended | ProtonVPN Free |
VPN protocols are the technical standards that determine how VPN connections are made. In 2026, the main protocols are:
The newest major protocol. Significantly faster than older protocols, uses modern cryptography, and has a smaller code base (easier to audit). NordVPN's NordLynx and Mullvad's primary offering are both WireGuard-based. Recommended for speed and security.
The industry standard for nearly two decades. Open-source, thoroughly audited, and battle-tested. Slightly slower than WireGuard but extremely reliable. Good fallback option when WireGuard is blocked.
Fast reconnection when switching networks (WiFi to cellular), making it excellent for mobile devices. Less flexible than OpenVPN but reliable for everyday use.
The right VPN depends on your primary use case:
NordVPN is the best VPN for most people. It's the fastest VPN based on independent benchmarks, reliably unblocks Netflix, has an audited no-log policy, and costs $3.09/month on the 2-year plan — less than a cup of coffee.
Get NordVPN at 74% Off — $3.09/mo30-day money-back guarantee. Try risk-free.