I recently was living in another city, whose local language differs from my own. Due to spotty network coverage, I ended up having to share my phone's hotspot. When I did ads on YouTube all played in my home's language. This all from an ungoogled phone where I haven't really logged in to Google through any apps except the browser.<p>If such tracking occurs at the device level, how would you even know what to do to prevent it?
Pretty much. They try to link devices to a user so they can track you as your browsing swaps from one device to another, its looking at you at a user level. Google have discussed stopping this but I am not aware of them doing it.<p>They do this for both logged in and not users. If interested read about 'Google Signals' as this is the way they are increasingly look to track in the post-cookie future.<p>to stop it... not sure. Avoid Android and use anti-tracking blockers like Ghostery? Not sure how well this latter stuff works or if you just become another persons customer.