I think the article is making the (reasonable?) assumption Google's search and advertising will use Google's own in-house Bard or something similar. The article

I think the article is making the (reasonable?) assumption Google's search and advertising will use Google's own in-house Bard or something similar. The article mentioned something about Google having the full vertical stack: hardware, networking, software, ML model, product, and the users. As of right now, Bard is separate. Or if Google has integrated ML models into search and ads, it hasn't been widely discussed.