Google seems to be testing a new feature for shopping ads, where as you slide through the shopping ads carousel, it shows you which stores retail brands are being displayed. I cannot currently replicate this but it does help you see which merchants are being featured in this shopping ads carousel.

Here is a GIF I made from a video shared from Khushal Bherwani on Twitter of this in action:

He shared a lot more examples on Twitter:

Here are more examples:

It is subtle, I am not sure that I dislike it or not.

Forum discussion at Twitter.