Google seems to be testing a query refinement ad option. Where Google is showing other search queries related to the ads it is showing under a sponsored ad carousel in the search results.
I cannot replicate this but Saad AK spotted this and posted a video of this in action on X - here is a screen grab from that video showing the ad carousel with the query refinement buttons in the ad carousel:
Here is an embed of the video:
Google > Mobile
— Saad AK (@SaadAlikhan1994) July 10, 2024
Google is testing a new format of Ads in SERPs with search queries mentioned in it ( in a tile view ). I haven't seen this before.
Sending to: @rustybrick SIR. pic.twitter.com/tSqdpOqy6v
Have you seen this before?
🆕 Noticed Refine your search section at sponsored ads carousal section. pic.twitter.com/BYMHWTWNhi
— Khushal Bherwani (@b4k_khushal) November 8, 2023
Forum discussion at X.