What Is VPN?
A VPN (Virtual Private Network) is a service that encrypts your device's internet traffic and routes it through a remote server operated by the VPN provider. This hides your real IP address from the websites you visit and hides your browsing activity from your internet service provider, while making your traffic unreadable to anyone monitoring the network you're on.
How a VPN works
When you connect to a VPN, your device establishes an encrypted tunnel to one of the provider's servers using a VPN protocol such as WireGuard, OpenVPN, or IKEv2. Every packet your device sends is encrypted before it leaves your network interface, travels through your ISP's infrastructure in unreadable form, and is decrypted only at the VPN server, which forwards it to its destination.
From the destination's perspective — a website, an app, a streaming service — the traffic appears to originate from the VPN server's IP address, not yours. Responses follow the same path in reverse: to the VPN server, encrypted, back through the tunnel to your device.
Modern consumer VPNs encrypt with AES-256 or ChaCha20 — ciphers that are computationally infeasible to break by brute force. The practical weak points of a VPN are not the encryption itself but the provider's logging behavior, software bugs (leaks), and the endpoints outside the tunnel.
What a VPN protects — and what it doesn't
A VPN protects the transport of your data: your ISP can no longer read or selectively throttle your traffic, operators of public WiFi networks can't snoop on your sessions, and websites can't log your real IP address or derive your physical location from it.
A VPN does not make you anonymous. Websites can still identify you through accounts you log into, cookies, and browser fingerprinting. It doesn't protect against malware or phishing. And it shifts trust rather than eliminating it: your ISP can no longer see your activity, but the VPN provider technically could — which is why independently audited no-logs policies matter more than any other feature.
Common uses
The most common consumer uses are: securing traffic on public WiFi (hotels, airports, cafés), preventing ISP throttling of video streams, keeping your home-country services working while traveling (banking apps and streaming subscriptions often refuse foreign IP addresses), reducing IP-based price discrimination, and maintaining access to the open internet in countries that filter it.
Businesses use VPNs differently — typically to give remote employees an encrypted route into the company network. Consumer VPN services as covered on this site are a different product solving privacy and access problems for individuals.
Frequently Asked Questions
Is using a VPN legal?
In most countries, yes — including the US, UK, EU, Canada, and Australia. A small number of countries restrict or regulate VPN use (China, Iran, Russia, UAE, Belarus, North Korea, Turkmenistan). Even where VPNs are restricted, enforcement against ordinary personal use is rare, but you should understand local law before traveling.
Does a VPN slow down my internet?
Somewhat — encryption and the extra hop cost speed. On modern WireGuard-based protocols, top providers retain 75-85% of your base speed on nearby servers (see our speed benchmark). Long-distance connections lose more. For most connections this is imperceptible in daily use.
Can my ISP see I'm using a VPN?
Your ISP can see that you're connected to a VPN server (an encrypted stream to a single IP), but not what passes through it. In countries that block VPNs, obfuscated protocols disguise this connection as ordinary HTTPS traffic.
Do I need a VPN at home?
It depends on your threat model. At home the main benefits are preventing ISP logging and throttling, and location flexibility for streaming and pricing. On networks you don't control — hotels, airports, offices — the encryption benefit is much more direct.
What's the difference between a VPN and a proxy?
A proxy forwards traffic for a single app or browser without necessarily encrypting it. A VPN encrypts all traffic from your entire device at the network level. Proxies are lighter; VPNs are far more comprehensive and secure.