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

https://www.sierrabookmarking.win/every-time-you-visit-a-website-or-use-an-app-you-leave-behind-a-trail-of-data

Every time you browse the web, you leave behind a trail of data—a digital footprint—that companies use to build a profile on you. It’s how those random ads seem to follow you across the internet