VPN: what is it, in one sentence?
A VPN (for Virtual Private Network) is a service that encrypts your internet connection and routes your traffic through an intermediary server located elsewhere in the world. The immediate consequence: your ISP, the sites you visit and hackers on public Wi-Fi can no longer see what you’re doing or where you’re actually coming from.
It’s a tool that is simple to use (an app you install and activate in one click), but one that changes a lot about your relationship with the internet.
How does it work, in practice?
Picture your normal internet connection as a postcard: everything you send (sites visited, searches, messages) is readable along the way by your ISP, your employer if you’re at the office, or anyone sharing your public Wi-Fi. That’s how the internet works by default.
With a VPN, that postcard is placed inside a sealed, opaque envelope that nobody can open. What’s more, instead of sending the envelope directly to the recipient, you hand it to a trusted courier (the VPN server), who then forwards it to the real recipient — in its name, not yours.
The result:
- Your ISP no longer sees what you’re doing — it just sees that you’re sending sealed envelopes to a VPN server.
- The sites you visit no longer see your address — they think they’re talking to the VPN server.
- People on the same Wi-Fi as you can’t intercept anything, because everything is encrypted.
And all of this happens in the background, with nothing for you to do day-to-day after installation.
What is it for? 7 concrete use cases
1. Protect yourself on public Wi-Fi
Free Wi-Fi hotspots (cafes, hotels, airports, train stations) are notoriously insecure. Anyone with a laptop and an interception tool can read the unencrypted data flowing through — passwords included. With a VPN enabled, everything you do is encrypted before it even leaves your device, making interception pointless.
This is probably reason number one to have a VPN if you travel often or work on the go.
2. Unblock foreign streaming catalogues
Netflix, Disney+, Prime Video, BBC iPlayer, Hulu: each country has its own catalogue. By connecting to a VPN server in the United States, you access the Netflix US catalogue (which often has two to three times more titles than the local one). By connecting to the United Kingdom, you can access BBC iPlayer from abroad.
Streaming services try to block VPNs, but the major providers (NordVPN, Surfshark, CyberGhost) update their servers continuously to get around these blocks.
3. Bypass censorship while travelling
If you travel to China, Russia, Iran or other countries with restricted internet, a VPN lets you access Google, WhatsApp, Gmail and blocked sites normally. VPNs with an obfuscation mode (NordVPN, Surfshark NoBorders, Proton VPN Stealth) are specifically designed to work in those environments.
4. Download via P2P without exposing your IP
BitTorrent downloads publicly expose your IP address to every other participant in the network. A VPN hides your real IP and replaces it with the VPN server’s, protecting your privacy. Some VPNs like CyberGhost even offer dedicated P2P servers, optimised for this type of traffic.
5. Avoid ad tracking and profiling
Without a VPN, your ISP can log every site you visit and resell that data to advertising aggregators (this has been legal in the United States since 2017, for example). With a VPN, your ISP only sees the VPN server — that’s it. Your browsing history becomes private again.
6. Access services from your country while abroad
On holiday abroad and want to watch France 2, listen to Radio France or log into online banking (which sometimes blocks foreign IPs)? Connect to a server in your home country through your VPN and you appear to be back home. It’s instant and transparent.
7. Compare prices (plane tickets, hotels, software)
Some booking sites show different prices depending on your country of origin. Switching VPN server lets you compare prices and sometimes save significantly — particularly true for long-haul flights and some software subscriptions.
What a VPN does NOT do
It’s important to lay out the limits honestly. A VPN:
- Does not make you absolutely anonymous on Google, Facebook or any site where you’re logged into a personal account.
- Is not an antivirus. It doesn’t scan the files you download or block ransomware at execution time.
- Doesn’t make illegal things legal. Downloading pirated works is still illegal, VPN or not — the VPN only reduces the risk of being detected.
- Doesn’t replace a password manager or two-factor authentication.
- Doesn’t block cookies or browser fingerprinting (for that, you need a privacy-focused browser like hardened Firefox or Brave, or extensions like uBlock Origin).
A VPN is a specific tool that solves specific problems. It’s part of broader digital hygiene, not a silver bullet.
What makes a good VPN
If you decide to pick a VPN, here are the five criteria that really matter:
1. Speed
A VPN always introduces a small detour, so a little throughput loss. The best services lose between 5% and 15% on nearby servers — imperceptible. Bad services make you lose 50% or more. Prefer a VPN that supports the WireGuard protocol or a derivative (NordLynx, Lightway).
2. No-logs policy
A good VPN must keep no logs of your activity. And crucially, this promise must be audited by an independent third party (PwC, Deloitte, Cure53). Otherwise you’re being asked to take the provider at its word — which isn’t serious.
3. Jurisdiction
The country where the VPN is based matters: a VPN based in Switzerland, Panama or the British Virgin Islands is legally protected from data-retention obligations. Avoid Chinese, Russian or 5 Eyes-based VPNs if privacy is critical.
4. Kill switch
The kill switch is an essential feature: if the VPN connection drops suddenly, it automatically cuts the internet so that your real IP isn’t exposed. All good VPNs include one.
5. Number of servers and countries
The more servers and countries a VPN has, the more options you get (for streaming, speed, gaming) and the less saturated the servers are. The leaders offer between 3,000 and 11,000 servers across 60 to 130 countries.
Which VPN to pick when starting out?
If you’re new and want a simple, effective VPN that ticks every box:
- NordVPN — our number one pick for 2026, the fastest, most complete, audited three times. From €3.09/month on a 2-year plan.
- Surfshark — the cheaper alternative with unlimited connections. Perfect for families. From €2.19/month.
- CyberGhost — the easiest to use, ideal for beginners and streaming fans. From €2.03/month.
- Proton VPN — the most secure, with a genuinely usable free plan. Published by the Swiss company behind Proton Mail.
To dig deeper, see our complete best VPN comparison or our detailed reviews of each service.
In summary
A VPN is a simple, affordable tool (€2-€4 per month) that delivers tangible benefits: public Wi-Fi protection, access to foreign streaming catalogues, enhanced privacy, bypassing censorship while travelling. It’s neither a magic solution nor a gimmick: it’s a pillar of modern digital hygiene, alongside a strong password and an antivirus.
If you’ve never used one, take advantage of the money-back guarantees (30 days on NordVPN and Surfshark, 45 days on CyberGhost) to test thoroughly with no risk. That’s the best way to see the difference for yourself.