Google is testing a new way to present Search ads in its search results. Now, it is grouping all search ads under “Sponsored results” header in a single expandable section. Users can click a button at the end of this section to view even more paid results.
This change appears to streamline the presentation of ads, visually separating them from organic results and offering an option to explore more related ads in one place.

This new layout has been spotted on both desktop and mobile versions of Search.
Read about it here: Google Search Results Page With Large Sponsored Results Ad Grouping
