> an IP address is always going to be the easiest way to track a user Note that an IP address is not unique to a single user (NAT, CGNAT, mobile networks) and

> an IP address is always going to be the easiest way to track a user Note that an IP address is not unique to a single user (NAT, CGNAT, mobile networks) and may frequently change. > also user agent information All users who use the same version of a browser on the same OS typically share the same user agent string (unless modified with a plugin or an extension). It's an indicator, but can't be used as a fingerprint itself.