The following procedure shows how to create a sub-site in SharePoint 2013.
Step 1
Log into your SharePoint 2013 site.
Step 2
Click on the "Settings" icon and choose "Site Contents" from the drop-down menu.

Step 3
At the bottom of the page, click on "new subsite" under the "Subsites" header.

Step 4
Enter the "Title" and "Description" of your new subsite, choose the URL for it and select a template for this subsite.

Step 5
Select the necessary permission and navigation settings and click "Create."

Step 6
Now you can see your newly created sub site.

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