[vineyardmike]

Not just google specifically, but making a product better is good for business. Eg making gmail better means more gmail users who log in more often and see more ads.

Practically speaking, most big (tech) companies probably have split teams for UI/Product and Ads. So there’s most likely a team of product managers and engineers at G who’s entire job is to make Gmail better - regardless of the ad team in the next building over. So those people literally don’t care about making G money per se, as long as they’re not introducing bugs into the ad showing logic or making it worse (see first point).