"Hey Google"

I wonder what "Google" means to Aaron. He knows that small round box would glitter and respond to us when we say "hey Google" following with arbitrary words. He would always stare to the sound source when he hears.

So now "hey Google" becomes magic word to "calm" him down. For example, when he was struggling with being teethbrushed, Mom saying "hey Google" would stop his movement. We could not tell from his expression whether this is fear or curiosity or anything. He also seems aware of that box speak in a different way from parent's daily conversation. So he shows difference in responding English and Chinese.