1 The Maps API has various elements such as Places, Coordinates and GeoLocation
(the latter is a paid-for API that charges per request). Only use what you need.
2 Each API has extensive documentation
. It’s well worth studying this in detail when you first use a new API, as you may save yourself headaches in the long run.
3 Google has a dedicated Google Groups forum for many of its APIs, such as the AdWords one. If you need help or advice, this is the best place to start.