When a VPN genuinely helps, when it makes little difference, what it costs you in speed and trust, and how to choose one if you decide you need it.
VPN adverts can make it sound as if you are unsafe online without one. The reality is more nuanced. A VPN is a useful tool for some situations and largely unnecessary for others. This guide sets out both, so you can decide whether it is worth paying for.
What a VPN actually does?
A virtual private network creates an encrypted connection, often called a tunnel, between your device and a server run by the VPN provider. Your internet traffic travels through that tunnel before going out to the wider internet. As a result:
- your broadband provider or the Wi-Fi operator can see that you are connected to a VPN, but not which sites you visit through it;
- websites see the VPN server's IP address rather than yours;
- the VPN provider itself can potentially see your traffic, so you are moving trust from your ISP to the VPN company.
When a VPN genuinely helps?
- Untrusted Wi-Fi: hotels, cafés, airports and other networks where you do not know who runs the network. Most sites already use HTTPS encryption, which protects the content of your browsing, but a VPN adds protection for apps and services that may not, and hides which sites you visit from the network operator.
- Privacy from your ISP: if you do not want your broadband provider to see the domains you visit.
- Travel: accessing your UK services and accounts while abroad, subject to each service's terms.
- Work: many employers require a corporate VPN to reach internal systems. That is a different product from a consumer VPN.
When it makes little difference?
- Tracking by websites and advertisers: cookies, logins and browser fingerprinting still identify you. If you sign in to an account, the site knows who you are regardless of your IP address.
- Viruses and phishing: a VPN does not stop you downloading malware or entering your password on a fake site. Some VPN apps include blocking features, but they are not a substitute for updates, good passwords and two-step verification.
- Home broadband for everyday browsing: if you trust your provider and use HTTPS sites, the security gain is modest.
The trade-offs
- Speed: extra encryption and the distance to the server can slow your connection, though modern protocols such as WireGuard keep the overhead small.
- Trust: the provider can see a lot. Look for an independently audited no-logs policy and a clear privacy notice.
- Blocked services: some websites, banks and streaming services block known VPN addresses or restrict what you can do while connected.
- Cost: good VPNs are a paid subscription. Be wary of free VPNs, which may fund themselves through advertising or data collection.
A quick way to decide
- Do you regularly use public or hotel Wi-Fi? A VPN is worth considering.
- Do you want to hide your browsing from your ISP? A VPN helps.
- Is your main worry scams, malware or tracking? Focus on updates, a password manager, two-step verification and browser privacy settings first.
If you decide to get one: what to check
- An independently audited no-logs policy.
- Modern protocols (WireGuard or OpenVPN; avoid PPTP).
- A kill switch that blocks traffic if the VPN drops.
- Apps for all your devices, and the number of simultaneous connections.
- Clear pricing and renewal terms. Introductory prices often rise at renewal.
- A money-back guarantee so you can test speed on your own connection.
If you want a starting point, NordVPN is one widely used provider that offers WireGuard-based connections, a kill switch and independently audited no-logs claims (see NordVPN's current plans). This is an affiliate link: we may earn a commission if you buy through it, at no extra cost to you. Compare it against the checklist above and any alternatives before buying.
Frequently asked questions
Is using a VPN legal in the UK?
Yes. What you do while connected is still subject to the law.
Does a VPN make me anonymous?
No. It hides your IP address and traffic from some parties, but accounts, cookies and the VPN provider can still identify you.
Sources and further reading
Facts checked on 20 October 2026. Spotted an error? Tell us and we will correct it.