How do hints work on Android when physically approaching an object?

Question

Android

There are applications based on geolocation that show a person interesting objects around.
For example, a person walks past the Bookvoed store, and a hint pops up for him "The Bookvoed store is 10 meters from you."
Question: Is there such a thing in the built-in Android services. Google Maps is there or something
else.
What words to google.Something like "Android geolocation targeting" And if so, how to add your company so that people passing by the office receive a notification "You are near company X"

Answer 1

How do hints work on Android when physically approaching an object?

A pre-installed application constantly checks your geo-coordinates, calculates the distance to objects in its database and displays a message.
Option 1. Write your own application and somehow motivate (for example, with good discounts) potential customers to install it.
Option 2. Buy advertising in other applications with geo-location (Yandex navigator, Google maps, OsmAnd, Yep!, VK, Facebook, etc.)

Answer 2

The technology is called Geofencing, the same word and Google.
Usage documentation: in android , in ios .