Included in iOS 7 is a location technology known as “iBeacon.” This technology was designed for use in physical locations where different spaces might give off relevant signals. TidBITS explains it thusly:
…because the point of iBeacons is to help you find things — or, rather, to help your iOS device to find itself. iBeacons is the general name for a set of additions to the Core Location framework that developers can use when designing apps: it isn’t a new piece of hardware, nor a new app, but a capability. Apps can use iBeacons to answer the question “Where am I?” not in terms of a location on a map, like GPS does, but in terms of where the device is relative to another device. Specifically, where it is relative to another device acting as an iBeacon.