I really easy to avoid FB and its really difficult to avoid Google.
Agree and agree. Personally its easy to avoid one of them, I don't use Facebook or any form of social media.Google's primary business is your data, the hoarding, indexing and collecting of it. Yes they carry the most data about you, but being it their primary business it also means they want to have it secure. Which they have proven it to be the way they want to go, of course there are cracks and annoyances (we all know them) or even simply lawbreaking collections of it. But when push comes to shove they want it secure, so they can make use of it for as long as possible.
Whereas Facebook has proven itself to disregard any such measures and just blatantly collects everything they can and even decides how your data is "perceived" regardless of intentions or need of it. Especially personal information such as contacts, phone numbers, geo-location coordinates etc... Therefore, I personally find Facebook to be the more detrimental party to your data and privacy than Google is.
The results are as expected, regardless of personal opinion. Google analytics, ads platform, gmail intergration etc... Is just too easy to incorporate and makes most sense for the average website/personal-blog user. Though depending on where you live and habits, Amazon and Facebook might swap places for some.
They work together, that answers the question. When I buy an item, I see ADs for it in FB and Google ADs.
You don't need to have a FB account or use FB in order to be tracked by FB.I don't use FB so..............