Like self-driving cars? I think they are desperately groping for something to diversify, because the ad models come and go, and the revenue can some day dry up.
Well, what are you going to watch while you're being driven around?
Technically Google doesn't own Waymo, Alphabet does. Maybe that's part of the reason why.
Google is a data company, offering the opportunity to manipulate some of that data in exchange for money.
.. manipulate some of that data to improve their ads.