Google is introducing its related topics search filter feature to desktop search results for users in the US who search in English. The feature allows users to explore topics related to their search and as they appear alongside filters at the top of the search results page, users can order topics and filters in terms of relevance. Google added that its systems display topics and filters in the most useful order for a particular query. The interface change could influence what people see and click on within desktop search results.

source: Google rolling out related topics filter on desktop search results