What a VPN Actually Protects You From
A VPN encrypts your internet traffic between your device and the VPN server. This means:
- Your ISP cannot see what sites you visit. Without a VPN, your ISP sees every domain you request. With a VPN, they only see that you are connected to a VPN server.
- Your real IP address is hidden from websites. Sites you visit see the VPN server's IP, not yours.
- Public Wi-Fi users cannot intercept your traffic. The encryption prevents other users on the same network from reading your data.
- Geo-restrictions based on IP can be bypassed. You appear to be in whichever country your VPN server is located.
What a VPN Does NOT Protect You From
Browser fingerprinting: Advertisers can identify you across sessions by combining your browser version, screen resolution, timezone, language settings, and installed fonts. A VPN changes your IP but not your browser fingerprint. Changing IP does not make you anonymous if your fingerprint is consistent.
Cookies and tracking scripts: Websites set tracking cookies that follow you across sessions. A VPN does not block these. Use a browser with built-in cookie blocking or an extension like uBlock Origin alongside your VPN.
Your own accounts: When you log into Google, Facebook, or any other service, that service knows who you are regardless of which IP you connected from. A VPN does not anonymize authenticated sessions.
VPN provider visibility: Your VPN provider can see your traffic instead of your ISP. This is only an improvement if you trust your VPN provider more than your ISP. Choose a provider with an audited no-logs policy.
Who Needs a VPN for Privacy?
A VPN is most valuable for: people in countries with pervasive government surveillance, people who use public Wi-Fi regularly, anyone who wants to prevent their ISP from building and selling a browsing profile, and people who want to prevent IP-based tracking across websites.
For the average person in a democratic country on a home network, a VPN is a useful but not essential privacy tool. Combine it with a privacy-focused browser (Firefox with uBlock Origin, or Brave) for meaningful overall privacy improvement.