This document introduces the ArcGIS Geotrigger service, which allows apps to trigger actions or messages based on a user's location. It discusses use cases like home automation and location-based gaming. The document outlines the geotrigger technology components, including mobile SDKs, APIs, and battery management. It also shows how geotriggers can be created and customized visually in an editor. Finally, it discusses best practices for privacy in location-based apps and announces that geotrigger SDKs and APIs will be available the next day.