What is a VPN? What it does and does not do

What a VPN Actually Does

VPN (Virtual Private Network) promises anonymity, invisibility, and total protection. This is not exactly true.

Normally, your traffic flows like this: Computer -> Router -> ISP -> Website

Your ISP (Internet Service Provider) can see every domain you visit. They can not see what you did there if the site uses HTTPS.

With a VPN, your traffic flows like this: Computer -> Encrypted channel -> VPN server -> Website

Your ISP now sees one thing: you connected to a VPN server. Everything after that is encrypted and hidden from them.

What VPN protects

1. It hides your browsing from your ISP

2. It hides your real IP address from websites

This is why people use VPNs to access geo-blocked content. The website thinks you are in a different country, VPN server's country.

3. It protects you on public Wi-Fi

Public Wi-Fi in cafes, airports, hotels is often unencrypted or poorly secured. Anyone on the same network can potentially intercept your traffic. A VPN encrypts everything from your device to the sever.

What a VPN does NOT do

1. It does not make you anonymous

You're not invisible. You've just shifted trust from your ISP to the VPN provider. The VPN provider sees everything your ISP would have seen. Free VPNs are notorious for selling your browsing data to advertisers.

2. It doesn't protect you from malware

A VPN is not an antivirus. If you download malicious software or visit a phishing site, the VPN won't stop you. It encrypts your connection — it doesn't evaluate what's traveling through that connection.

3. It doesn't hide you from the websites you're logged into

If you're logged into Google while using a VPN, Google still knows it's you. Your account, your cookies, your login session — all still tracked.

4. It doesn't bypass HTTPS

Websites using HTTPS already encrypt your traffic. A VPN adds a second layer, but the VPN provider can still see which domains you visit — just like your ISP could.

When You Actually Need a VPN

• You're on public Wi-Fi and doing something sensitive (banking, work email)
• You live in a country with internet censorship and want to access blocked content
• You want to hide your browsing from your ISP specifically
• You're traveling and need to access services only available in your home country

How to Choose a VPN

• Don't use free VPNs. They monetize your data. You're the product.
• Look for a no-logs policy that's been audited by an independent third party.
• Check where the company is based. Different countries have different data retention laws.
• Avoid services that spend more on YouTube ads than on security. Good VPNs don't need aggressive marketing.