Every time you browse, you leave a trail of data behind that companies use to...

https://smart-wiki.win/index.php/How_Do_I_Check_What_a_Website_Knows_About_Me%3F_A_Former_News_Producer%E2%80%99s_Guide

Every time you browse, you leave a trail of data behind that companies use to build a profile on your habits. It’s essentially a digital shadow following you across the web