Use Content Search in Microsoft Teams | Microsoft Learn Learn about using Content search in the Microsoft Purview portal to search for Microsoft Teams content that's stored in Exchange Online, SharePoint Online, OneDrive for Business, and OneNote
When to use the Content Query Web Part or the Content Search Web Part . . . You can use both Web Parts to display information that is stored in a subsite The user experience for content authors and home site visitors is identical, regardless of which Web Part you use The difference between the two Web Parts is the technology that the Web Parts use The CQWP queries a database, whereas the CSWP queries the search index
Overview of Content search | Microsoft Learn Use the Content search eDiscovery tool in the Microsoft Purview portal to quickly find email in Exchange mailboxes, documents in SharePoint sites and OneDrive locations, and instant messaging conversations in Skype for Business