Board Thread:Support Requests - Getting Technical/@comment-1600847-20140104173128/@comment-366087-20140104202627

Or

The "Subst" command means "insert the contents of the target page without a link-back", whereas just calling a template is *with* a link-back. The difference is the latter means if you want to make a change, you do it in one place and all the pages which link to it update as well. That updating will not happen with a Subst, you'd have to edit each page it appeared on. And yes, that has a usefulness.