A VPN (Virtual Private Network) is a service that creates a secure, encrypted connection between your device and the internet. When you use a VPN, your internet traffic is routed through a server operated by the VPN provider, hiding your real IP address and encrypting your data.
How Does a VPN Work?
Without a VPN, when you visit a website, your device connects directly to that website's server. Your Internet Service Provider (ISP) can see which websites you visit, and the website can see your IP address (which reveals your approximate location).
With a VPN, the process changes:
- Your device connects to a VPN server through an encrypted tunnel.
- The VPN server forwards your request to the website on your behalf.
- The website sees the VPN server's IP address, not yours.
- The response travels back through the encrypted tunnel to your device.
This means your ISP can see you are connected to a VPN but cannot see what you are doing. The website you visit sees the VPN's IP address, not your real one.
What Does a VPN Protect?
- Your IP address: Websites and services see the VPN server's IP instead of yours, hiding your real location.
- Your browsing activity: Your ISP cannot see which websites you visit or what content you access.
- Your data on public Wi-Fi: Encryption prevents attackers on the same network from intercepting your data.
- Your location: By connecting to a server in another country, you appear to be browsing from that country.
Common Uses for a VPN
Privacy from ISPs and advertisers
In many countries, ISPs can legally collect and sell your browsing data. A VPN prevents this by encrypting all your traffic so your ISP only sees that you are connected to a VPN server.
Security on public Wi-Fi
Public Wi-Fi networks at coffee shops, airports, and hotels are often unsecured. Anyone on the same network could potentially intercept your data. A VPN encrypts everything, making public Wi-Fi safe to use.
Accessing geo-restricted content
Streaming services like Netflix, Disney+, and BBC iPlayer offer different content in different countries. By connecting to a VPN server in another country, you can access content that is not available in your region.
Bypassing censorship
In countries with internet censorship, a VPN can help access blocked websites and services. This is why VPNs are popular in countries like China, Iran, and Russia.
What a VPN Does NOT Do
- Make you fully anonymous: Websites can still track you through cookies and account logins.
- Protect against malware: A VPN encrypts your connection but does not scan for viruses. You still need antivirus software.
- Make illegal activity legal: A VPN changes your IP address but does not change the law.
- Protect against phishing: If you click a malicious link, a VPN cannot prevent you from entering your credentials on a fake website.
VPN Protocols Explained
VPN protocols determine how your data is encrypted and transmitted. The most common protocols today are:
| Protocol | Speed | Security | Best For |
|---|---|---|---|
| WireGuard | Very Fast | Strong | General use, streaming, gaming |
| OpenVPN | Moderate | Very Strong | Maximum security, corporate use |
| IKEv2/IPSec | Fast | Strong | Mobile devices (handles network switching well) |
| NordLynx | Very Fast | Strong | NordVPN users |
| Lightway | Very Fast | Strong | ExpressVPN users |
Ready to Try a VPN?
If you are considering getting a VPN, check out our best VPN rankings for 2026. We test every VPN ourselves and provide honest, independent recommendations. If budget is a concern, see our guide to the best free VPNs.
Not sure if you need one? Read our guide on when a VPN is actually worth it to decide. You can also compare individual VPNs in our detailed reviews: NordVPN, ExpressVPN, Surfshark, Proton VPN, and CyberGhost.