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Google paid a whopping $26.3 billion in 2021 to be the default search engine everywhere
(www.theverge.com)
This is a most excellent place for technology news and articles.
Ads are a core component of how search makes money. They're also a core component of how YouTube makes money.
Ads are what Google makes money with. That's their core business. I would argue most of what they offer is just a different way of either delivering you ads or farming your data for...ads.