Drag and drop files into document libraries to migrate documents. SharePoint Online Document Migration Options.
SharePoint Upload Options – Default Upload
SharePoint Document Set
Custom Permissions and Groups in SharePoint
Content Type Hub in SharePoint
Create a SharePoint Content Type
Content types enable organizations to organize, manage, and handle content in a consistent way across a site collection. By defining content types for specific kinds of documents or information products, an organization can ensure that each of these groups of content is managed in a consistent way. Example: If you have a company template (company logo, address, phone number, email address etc.) that should be used on all the documents. Not all your employees might add the desired properties in the same way.