After you add the World Gazetteer service to your ArcGIS Server, it is ready to use.
ArcGIS Pro
For information about how to use World Gazetteer in ArcGIS Pro, see An overview of the Geocoding toolbox in the ArcGIS Pro help by clicking Tool Reference > Tools > Geocoding toolbox.
ArcGIS Server
For information about using the locator with ArcGIS Server, see Geocode services and locators in the ArcGIS Server (Windows) help by clicking Manage Services > Types of services.
ArcGIS APIs and SDKs
ArcGIS API for Flex, ArcGIS API for JavaScript, ArcGIS API for Silverlight, ArcGIS REST API, and ArcGIS Runtime SDK for Windows Mobile users can take advantage of World Gazetteer in applications. Details for implementing a geocoding service are available in the ArcGIS Developer documentation.