Got this notification when I opened Chrome when coming back to my desk after lunch.
"We changed our privacy settings to allow us to snoop on what you're looking at and shove you ads accordingly. Feel free to opt out, but we'll probably opt you back in when you aren't paying attention."
They are also scarily accurate too. To the point where some people were finding out their teenage daughters were secretly pregnant when Target would send them an infant coupon package in the mail that was intercepted by them. That was guessed solely on data Google and other entities sold them, that's crazy.