Google hijacked my search result with that fine recruiting method at work a few weeks ago. I checked it out with a burner Google account and it seems like it was a recruiting method where they have you solve programming questions on that service[1]. I did a few of the "levels" and they're all just tricky programming questions. However..
Even not signed into an account, which, I don't sign in to any Google services at work in interest of protecting IP, Google was able to track enough via cookies / me being on an si corp network to throw that to me.
[1] Pic I took on my phone: https://i.imgur.com/7X7ybUv.jpeg