How are sites like PayPal tracking me on other sites?

Question

I know cookies are a thing, but how do they know I’ve been on other sites? My reason for asking is that the last time I visited Groupon I received a coupon in my email for $5 off. Today I visited 1800flowers and got a PayPal coupon from them. I don’t have a PayPal app or anything, so how do they know I’ve been on groupon?

In: 0

Answer 1

any number of ways:
– tracking ids like Apple, Google Fb and pretty much every major service.
-ip address
-referring sites (you would be AMAZED to see how much detail your browser reports to sites, and what they’re able to process)
-nefarious usage of permissions (e.g. Amazon/Google constantly record/process almost all audio on your Mics, even when not in active use).

privacy on the internet is a myth