Little things that seem unimportant — how many of us are interested in a particular movie or what time of day we tend to buy gas — are a gold mine of data for a truly smart computer. For Google, too, because the companies producing movies and selling gas are interested in working with the advertiser who knows these things. Assistant may seem like an altruistic offering from Google to mankind, but it’s a money-making opportunity first.
Source: Google Assistant for every phone was the best move Google will make in 2017 | Android Central