If you have two devices in a house and one never accesses Google and the other does, Google will know it's you using the non-Google device each and every time.

If you have two devices in a house and one never accesses Google and the other does, Google will know it's you using the non-Google device each and every time. There's more to mining you then cookies and tracking pixels. They use IPs, hardware and software profiling, behavioural patterns, and even the way you type on your keyboard (this is very, very accurate.) In short: you need a "clean room" (Tails) every time you go online and you need to change where you're coming online from (VPN). You can also use tools to change your keyboard/typing "profile" so as to cripple that means of tracking. Oh and you can't login to virtually any online account at all, ever, because these cookies can be used too.