Privacy · Plain-English answer
A VPN protects against some attacks, mainly snooping and interception on untrusted networks like public Wi-Fi, and it hides your IP from direct targeting. It does not stop phishing, malware, viruses, or password theft. For those you need good passwords, two-factor authentication, updates, and healthy scepticism.
A VPN's encryption defeats network-level snooping. On public Wi-Fi, an attacker on the same network cannot read or tamper with your traffic, and rogue hotspots set up to intercept connections capture only encrypted data. It also hides your home IP address, which prevents direct probing of your connection and makes targeted denial-of-service attacks against you much harder.
These are real protections, and they are strongest exactly where the risk is highest, on networks full of strangers.
Most successful attacks on ordinary people never touch the network layer. Phishing emails trick you into typing your password on a fake site, and a VPN delivers that fake site encrypted just the same. Malware from a bad download runs on your device inside the tunnel. Reused passwords leak from other companies' breaches without any involvement from your connection.
The honest summary is that a VPN is a network privacy tool, not an antivirus. Use it alongside a password manager, two-factor authentication, and prompt software updates, not instead of them.
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