Computerworld - https://www.computerworld.com/article/3253287/collaboration/how-to-use-the-highlighted-content-web-part-on-modern-sharepoint-pages.html#tk.rss_all
The Highlighted Content web part is modern SharePoint’s answer to the classic Content Search and Content Query Web Parts. New features will be coming to this web part based on what we learned at Ignite 2017, but there are some great solutions you can build today.
Highlighted Content — a great tool for helpful solutions
Highlighted Content is available only on modern SharePoint pages. The basic configuration available with the web part allows you to roll up content in an individual site, a document library on a site, or across an entire tenant based primarily on the type of content: News,