I think the in the book he was referring to B2C products when he said search will be replaced by AI. Their main B2C product is not ads. I don't think anyone I know has bought an ad from google.

It would be more accurate to say their main revenue stream is ads, which are sold through their main products (search, YouTube, etc.)

It's a bit nit picky because what most users use is theirnai search , well I'm guessing that's what most of us interact with

That is to say, its main product is its human users.

Are they integrating it well with AI overviews then? It looks like they haven't found a way to monetize it yet.

Yes, thank you.