Google knows they are the monster search engine.
They also know that it is humans doing the searches (I mean who else would?). They also know that they want money. (They don’t want to lose their bazillion dollars they get every year.) So they want humans to stay at their monster search engine.
Humans come to the Internet to find answers. Great answers, relevant answers, answers that make sense to their searches and answers that aren’t just trying to sell you something. So Google tries to create these algorithms that work hard in trying to find these human searchers the best of the web.
Notoriously there have been humans that cheat the search engine system by leaving crappy, fast links anywhere and anywhere. These links lead to crappy content mostly for sales purposes. Google used to look at these links and say “wow! That site/blog is way popular!
. . . Read More: Why Does Google Care About Quality on the Internet?