Google at the end of 2022 introduced topic filters to Search results which was a part of the carousel and now it seems rolling for desktop users as well. If you check the screenshot shared by 9To5Google, Google Search shows filters for Images, Maps, Shopping, Videos, News, Books, Flights, and Finance. Recently the company added filters with plus sign, that “help you drill down or discover something new about a specific topic.”
For example, if you’re searching for “dinner ideas,” you might see topics like “healthy” or “easy.” Tapping on a topic adds it to your query, helping you quickly refine your search results with less typing. Topics are dynamic and will change as you tap, giving you more options and helping you explore new areas. For example, if you tapped on “healthy,” you might see “vegetarian” or “quick” appear next.
Currently, the design in phone with carousel lack in some situations, and its not fit for smaller screen. The global rollout information is yet to be available for now.