At times, we may need to make a global item as non global on some specific page / post of the site.
Once you import the global item on a page, you can simply right click on the module / row / section and click on the Disable Global option as shown in snapshot below:
Please note that an item can be made non global on specific pages only, we can not make a global element as non global by directly making it non global from library.
Hope this helps!