Six months after its initial trial run, Facebook’s Place Tips program is finally expanding nationwide. Place Tips employs Bluetooth beacons to push FB posts and photos about a business to shoppers’ phones while they’re in the store. So if you’re standing in line at, say Wetzel’s Pretzels in the mall. If that pretzel stand has a Place Tips beacon, it will push information (and potentially coupons) to your phone automatically — you as the customer simply have to open you Facebook app to access them.
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https://www.engadget.com/2015/06/09/facebooks-place-tips-goes-national-retailers-get-free-beacons/