Google’s primary business is search. They monetize search in a couple different ways. The primary revenue model for search is micro auctions to determine ranking of product placement on search results.
I don’t have numbers but I suspect Google ads get far more eyeballs than do their search results. The distinction though is margin not quantity. Ads aren’t worth very much. Google ads generate a higher margin than Facebook ads but still tiny, like maybe fractions of a penny. When I was at Travelocity a million years ago I remember hotels bidding up to $18 per click for placement on searches related to Las Vegas. Not only is that click-through worth a fortune it is also relevant and thus far more likely to be clicked.
EDIT
Death by a thousand paper cuts.
Somebody provided a source below, they clearly did not read, which explains all of this:
https://www.cnbc.com/2021/05/18/how-does-google-make-money-a...
> Search is Google’s most lucrative unit. In 2020, the company generated $104 billion in “search and other” revenues, making up 71% of Google’s ad revenue and 57% of Alphabet’s total revenue.
This section of the article further details how the auctions differ from online advertisement products.
I don't have the source but Google's chief economist has been very clear about how the micro auctions work and generate revenue separately from display ads.