Public Wifi and When to Use a VPN

Public wifi, in a cafe, airport, or hotel, carries a real but often misunderstood risk. The concern is that you are sharing a network with strangers, and on a poorly secured network others may be able to observe your traffic. The reassuring news is that the modern web encrypts most connections by default, so the data you send to well-built sites is already protected in transit.

The remaining risk is enough to warrant care. A VPN closes it by wrapping all of your traffic in an encrypted tunnel, so that no one on the local network can see which sites you visit or intercept anything. On untrusted public wifi, a reputable VPN is genuinely useful, and it also prevents your internet provider at home from logging your browsing.

Keep expectations accurate. A VPN hides your traffic from the local network and your provider, and it masks your location from websites. It does not make you anonymous, it does not stop phishing or malware, and it does not protect accounts you are already logged in to. Avoid free VPNs in particular, because a service that does not charge you often profits by selling the very data you installed it to protect.

The simple rule: on public wifi, either use a trustworthy VPN or stick to tasks you would be comfortable doing in public, and save sensitive logins for a network you trust.