How do I set up a sub domain?

How do I set up a sub domain. One that is added on to my main domain.
I am with Site ground now, and was wondering how to do it, for instance maybe

@Leshooper, Here is a good article running you through the steps for setting up a sub-domain which would look like “” -

If you are looking to create a “sub-folder” as opposed to a “sub domain” like in your example then again you jump into your cPanel and in your “root folder” (this is where you website resides) you create a folder and call it “support” for example and then it would show up as -

Ok, I hope that helps…