You cannot be tracked if you use Surfshark.
However, if you use another VPN, then it depends on the VPN provider. Many free VPN companies profit from selling user metadata. Surfshark operates under a strict no-log policy. Unlike some other VPNs, we keep no data on what our users do on the internet.
Why is this important? In 2016, Hungary introduced new regulations for encryption and retention of metadata. This means that ISPs keep records of what you do online. Online communication companies that don’t use end-to-end encryption may be required to monitor the content of messages as well.
One way to overcome them is to use a VPN. That way, an ISP won’t be able to tell what you do online. A VPN can fool the intrusive and resource-intensive Deep Packet Inspection techniques. Advanced VPNs like Surfshark can even mask VPN use.