People paying ads to show up on google's users search results are google's customers
people using google's free services to see those google results that have gone to shit since the past 10 years or so, and also are full page of ads without ad blockers, are google's product, which is acquired through offering free product and services that hook those customers to stay hooked even through the enshittification that has proceeded on those since the web 2.0 golden era
but think logically for just a second, why would advertisers advertise their turd if they could just have their turd show up on the search results for free?
For a turd sandwich to work, you have to wrap your turd (ads) with high quality results so people actually search on Google and then you can show them the turd along with the good stuff.