Location-Based Services (LBS) - definition
A term that refers to a wide range of services based (or enhanced by) information about the physical location of a user and/or device.
Typical examples of location-based services for consumers are real-time turn-by-turn navigation, the location of the nearest restaurant or hotel, vehicle tracking etc.
For a location-based service to work there are some requirements to be fulfilled. The network must support it, and certain technologies must be built into the mobile phone (such as GPS and A-GPS).