This demo assumes you've already logged in to cPanel, and are starting on the home screen.
Now let's learn how to create a subdomain.
Click the Subdomains icon.
Enter the prefix of your new subdomain.
Make sure the domain name your subdomain will be associated with is selected.
A new folder called clients has also been created, which is where you would upload files for this subdomain.
A directory names the same as your subdomain prefix will automatically appear... although you can change this if you want.
Click the Create button.
That's it! A new subdomain has been created.