Great news from the Office 365 Team: The very popular Content Search Web Part and the Cross-Site Collection Publishing capabilities will be rolled out to SharePoint Online within the next few days.
What the heck is the Content Search Web Part (CSWP)?
CSWP uses SharePoint enterprise search technology to display dynamic results on a page.
What is heck is the Cross-Site Collection Publishing?
The Cross-Site Collection Publishing feature enables you to create and manage content from one location, and publish across and to numerous sites without duplicating or replicating content-content stays in place as a single source of truth.
In simple terms, The Content Search Web Part (CSWP) and Cross-Site Collection Publishing both enhance the number and quality of search-driven solutions you can build into your sites and portals.
Read the official announcement from here …
For more information about CSWP and Cross-Site Publishing, you can watch the following Arabic videos: