Improvements have been made for personalized search experience in SharePoint Online to make it easier for your users to find and filter results.

SharePoint Online search experience has been redesigned and streamlined to make it easier for you to find and filter results. With a Smarter interface providing rich previews enabling you to easily identify content with over 270+ file types and preview sites. Results are ranked based on personal relevance as determined by your collaborative patterns and results will now include people, list items and news.