What Is a VPN and Do You Actually Need One?

5 min read · Updated 13 November 2026

A plain-English explanation of what a VPN does and doesn't do, when it's worth using, and how to choose a trustworthy one in the UK.

VPNs are advertised everywhere, often with big promises about privacy and security. Some of those promises are true; some are exaggerated. Here's what a VPN actually does, so you can decide whether you need one.

What a VPN does

A VPN (virtual private network) creates an encrypted tunnel between your device and a server run by the VPN company. Your internet traffic goes through that tunnel, so:

• people on the same Wi-Fi network (for example in a café, hotel or airport) can't easily see what you're doing
• your broadband or mobile provider can't see which websites you visit, only that you're connected to a VPN
• websites see the VPN server's location and IP address instead of yours

What a VPN doesn't do

• It doesn't make you anonymous. If you log in to Google, Facebook or Amazon, they still know it's you.
• It doesn't stop scams or phishing. A fake website is just as fake through a VPN. Our phishing guide is still your best defence.
• It doesn't replace antivirus, updates or strong passwords.
• It moves trust rather than removing it. The VPN company can potentially see your traffic instead of your broadband provider, so choosing a trustworthy one matters.

When a VPN is worth it

• You often use public Wi-Fi for work or banking. That said, most websites and banking apps already encrypt your connection (look for https and the padlock), which reduces the risk a lot.
• You travel abroad and want to reach UK services in the way you do at home. Check the streaming service's terms, as some don't allow it.
• Your employer requires one to access work systems. In that case use the one they provide.
• You simply prefer that your provider can't see your browsing history.

For most people browsing at home on their own broadband, a VPN is a "nice to have", not essential.

How to choose a trustworthy VPN

1. Be very wary of free VPNs. Running servers costs money. Some free VPNs make it back by collecting and selling your data or showing intrusive ads. Exceptions exist, such as reputable companies that offer a limited free tier.
2. Look for an independently audited "no-logs" policy, meaning an outside firm has checked the company doesn't keep records of your activity.
3. Check where the company is based and how long it has been around.
4. Download only from official app stores or the company's own website.

Using a VPN is legal in the UK. Using one doesn't make illegal activity legal, of course.