https://www.reddit.com/r/explainlikeimfive/comments/3lfwao/eli5_how_much_exactly_does_google_know_about_me/
funnily enough, google must adhere to eu rules and allow you to download all info they have on you.
and they do just that.
https://support.google.com/accounts/answer/3024190?hl=enyou can also turn off all the spying/marketing features for google if you wish, this stuff is really transparent:
https://www.google.com/settings/u/0/ads/authenticatedyou can also turn off your history on youtube that will pretty much shit you adds and recommendations.
personally i have every single thing google allows me to to turn off, turned off.
turning everything off, requires a tiny bit of googling, google is really transparent with these, things are not hidden, the settings are not hidden.
you can even opt out of the cookie they provide.
seems every single thing google tracks can be turned off, not hidden in any menus, but sometimes you need to know what to look for.