Geocoding and Reverse Geocoding? - Google Maps v3
What is the difference between geocoding and reverse geocoding?
Geocoding is the process of converting a location addresses into geographic coordinates (latitude/longitude)
Reverse Geocoding:Reverse Geocoding is the process of converting geographic coordinates(lat/lng) into a location address.
Example: - 28.496718,77.078919 ---> Gurgaon Road, Sector 18, Gurgaon, Haryana
Use of the Google Geocoding API is subject to a query limit of 2,500 geolocation requests per day. (User of Google Maps API for Business may perform up to 100,000 requests per day.)
For more about Google Geocoding visit https://developers.google.com/maps/documentation/geocoding/