Every time you browse the web, you leave behind a trail of data—a digital...

https://wiki-room.win/index.php/Why_Do_Companies_Make_Money_From_My_Data_But_I_Don%27t%3F

Every time you browse the web, you leave behind a trail of data—a digital footprint—that companies use to track your habits. It’s how those strange ads seem to follow you across different sites