(back to Site Owner Help)
Moving a subsite within a site
collection is a fairly easy task. The
simplest way is to use the Content and Structure link under Site Settings.
Go to Site Settings and locate the Content and Structure link under the Site Administration section:
You should now be on the Site Content and Structure page. For this purpose, I would like to move the How-Tos site under the Training site.
Click on the dropdown area next to How-Tos and click Move
Specify where you want to move it TO and click OK
And you can see now that How-To’s is now a subsite