You tweet your excitement as you enter a professional sports arena and find yourself welcomed online by the team. You post an Instagram picture of the fancy way the towels in your hotel room have been folded and receive a message from the staff asking if you'd like to learn how it's done.
In both cases, you've more than likely entered a business location that has been "geofenced," a digital marking system using software that can notify a company when a customer enters an area marked off within an e-perimeter, or virtual fence.
Some geofencing software can even let a...