Using Copy structure and content, you can migrate sites from one environment to another.
Index
Prerequisites
You have site collection admin permissions on your source and destination site collections.
You have term store admin permissions on your source and destination if you have managed metadata (Terms, Term sets, Term set groups) in your migration scope.
Note: Site collection admin permissions are required even if you have higher admin privileges like SharePoint admin or global admin permissions. For more information, see Microsoft administrative permissions.
How-to
Tip: To copy a complete site collection at the destination, you can connect to your Admin center or Central admin at step (7). For more information, check the Site address connection types overview article.
Select Copy from the menu.
Select Copy structure and content.
Click Connect.
Select your source.
Click Next.
Click Connect.
Select your destination.
Click Next.
Select Sites from the list of Site objects.
Select the site(s) you want to copy from the source.
Tip: You can uncheck List content under Configuration in your copy options to migrate your sites' structure without documents and list items.
Drag and drop it into the destination, or click Start copy on the bottom-right corner.
Once the action is completed, the migration report will show any successes, warnings, or errors. See Migration Report for more details.