Facebook Will Track What Physical Stores You Go Into (popsci.com)

Facebook will soon roll out a feature that will allow advertisers to see which brick and mortar stores you've physically walked into. These details are collected from anyone who has the location services feature turned on, Facebook says. The will allow advertisers to see in real time which Facebook ads are turning into actual sales. Popular Science reports: Using the location services on your phone, Facebook will keep a tally of who goes to what stores, and show the anonymized numbers to advertisers, as evidence that buying ads on Facebook is getting people to visit brick-and-mortar businesses. It's a great thing for Facebook, which will now have excellent data to prove (or disprove) on a user-to-user basis what a store is getting for its advertising dollar. But it's a pretty frightening idea that a company will have information not unlike your credit card statement all from location services data.

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Re:Reasons

[Lumpy]

turn off Wifi as well. It can see what wifi AP's are available and use that data