If you’re using a VPN, you can’t be tracked online unless you manually leave personally identifiable information behind. VPNs fool DNS look-ups, the most basic way of tracking a person online. Moreover, VPNs hide your IP address as well – and an IP is a very personally identifiable digital footprint to leave behind.
Even better, a VPN fools Deep Packet Inspection. This resource-intensive method scans the contents of the information you send online. However, as a VPN encrypts all the data, DPI can’t read anything.