matrix

I don't have facebook on my phone. I understand why I see ads on facebook for things I've looked up on my computer, but today there was a website I looked up by clicking on pinterest ON MY PHONE and then ON MY COMPUTER on facebook I saw an ad for that website. I guess the common factor is pinterest which I have on my phone and on my computer, but still it's surprising. I would understand it better if I used google chrome on my computer, because I use it on my phone, but I use edge on my computer. 

So, facebook knows what I'm searching on a different device with a different browser