My guess: shopping results, followed by sponsored ads, followed by 1-2 results that are not ads but you don't care, some combination of news/Twitter/Youtube videos, more shopping results, then finally real search results. If "AI summary" didn't appear at the top.

I have seen that so many times that I can scroll to the "correct" part of the Google search result page within 2 seconds without thinking.

Now that I write this down, I realized how horrible this is.