Board Thread:Support Requests - Getting Started/@comment-24916335-20150316024936/@comment-3060206-20150416082144

Well it makes it a bit easier, I guess? To reword MediaWiki's description: Say you create a template called Template:Something but want it to be categorised under the "S" in all categories. DEFAULTSORT can set "S" to be the default letter the template is sorted under in categories so that you don't have to specify in each individual category tag, which would be a pain to change if you wanted to do a drastic rename.