How voice search may threaten Google’s advertising business

When the world shifted from desktop to smartphones, one thing didn’t change: the existence of a screen on both devices.
The screen shrank, but it remained the medium through which we interact with computers.
For Google, that meant its core online advertising business — visible search ads on a webpage — remained intact and lucrative.
Today, Google may be at the beginning of a new shift — one toward artificially intelligent virtual assistants, in which we use our voice to i