Summary
Reports from Semrush and SimilarWeb's RankRanger tool indicate that Google is displaying fewer sitelinks within its search results, with a drop of 10 to 20 percentage points starting from March 14th. Sitelinks are the links seen under the main search result listing. The reduction in sitelinks appears to be due to a test where sitelinks aren't shown at all for pages. This could impact Google Search Console data.