Google is testing a new feature that enables users to expand and filter down search results with a carousel-style unit.
The new feature was originally spotted on February 2nd, by @chris_at_b449 from London (UK).
Here's an example on how the unit appears on desktop:
The new feature seems to be in early stages as some of the filtering functionalities are not quite working as intended yet - when we searched for "baby clothes", then clicked on the "hat" filter, it showed results for all kinds of hats, not just baby hats.
We are looking forward to see how this new carousel-style feature evolves, and the impact this unit will have on both, paid and organic traffic.