I'll give you an example. I was recently searching for an old blog post I read about a guy who installed fiber at his home. No amount of specific or vague search terms on google would yield anything but endless pages of results that were either blogspam or ISP product pages for fiber internet. Surely google doesn't think an ISP in Australia offering fiber is relevant enough to an SF resident that it should be on the second page of results.
Results get exponentially worse the more pages in you go. By page 3 the only results are ISP's. Basically if it isn't on page 1, it's just padding almost totally unrelated to what you were looking for.
