According to Fasthosts Internet Ltd, #google receives the most internet traffic than any other platform in the world. In fact, the MONTHLY traffic that it gets is 86,005,000,000 more than 10x the world population!
#chrome is the default browser in #android phones and even in the safari browser in #ios devices, #google is the default search engine. This makes it the best place for advertisers to post their #ads so that it can GRAB as many EYES as possible. It is rightly so! Its ad revenue for just last 3 months of 2020 was at $46.20 Billion!
This is the reason they don’t charge for their search service.
Take the case of #news papers. They provide quite a lot of information. Literally pages! and come as cheap as INR 5(0.07 USD) in India. They make money through the classified ads that they show in them.
“If you don’t pay for a product, then you are the product!”
AND, they don’t just simply show every ad to every single people on the web. There is something called Ad Personalization. Try searching for adssettings.google.com. This shows you what it has learned from your online behavior. It then targets ads to you according to your “Tastes”.