> Most traffic nowadays is encrypted so all you get is the domain.
That can be still quite interesting for advertisers, and if you think about home ISPs rather than public Wi-Fi networks, you could easily imagine your ISP also supplying your demographic range and rough location to advertisers.
Even from purely public IP geolocation information alone, I'm able to pinpoint my IPv4 and IPv6 to my ZIP code (which spans only a couple of blocks). IPv6 allows tracking individual devices on a network persistently as well, i.e. distinguishing between people in a household.
That can be still quite interesting for advertisers, and if you think about home ISPs rather than public Wi-Fi networks, you could easily imagine your ISP also supplying your demographic range and rough location to advertisers.
Even from purely public IP geolocation information alone, I'm able to pinpoint my IPv4 and IPv6 to my ZIP code (which spans only a couple of blocks). IPv6 allows tracking individual devices on a network persistently as well, i.e. distinguishing between people in a household.