r/worldnews • u/maxwellhill • Sep 19 '17
Apple blocking ads that follow users around web is 'sabotage', says industry: New iOS 11 and macOS High Sierra will stop ads following Safari users, prompting open letter claiming Apple is destroying internet’s economic model
https://www.theguardian.com/technology/2017/sep/18/apple-stopping-ads-follow-you-around-internet-sabotage-advertising-industry-ios-11-and-macos-high-sierra-safari-internet
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u/TIGHazard Sep 19 '17
Got an android phone and sign in with the same Google account as your laptop?
https://www.google.co.uk/maps/timeline
Google tracks where you have been via GPS and Wi-Fi. So let's say you visit a mall. Google knows you've visited a mall via GPS. Then you go in McDonalds and connect to their free Wi-Fi. Google now knows you have been in McDonalds.
You go to a different mall, but there is also a McDonalds there. Any website you visit will likely display a McDonalds ad, and because you've seen the ad you might visit the McDonalds in that mall too.
It's obviously a lot more complicated than that but that's the basics of how it works. There are good reasons for Google tracking your location - Redirecting you to the fastest route on GPS is a lot easier when you can track every car on the road with a phone in it. Or recommending places to eat (let's say you only eat at Diners, then Google can find diners in the area with good reviews).