1. Log into your cPanel account.
2. In the „Domains“ section, click on „Subdomains“ Icon.
2. In the „Domains“ section, click on „Subdomains“ Icon.
3. Under „Create a Subdomain“ in the „Subdomain“ filed you should enter your subdomain name like „demo„(without quota) and should you have a number of domains, select the appropriate domain from the dropdown list.
4. Click on the „Create“ button.
How to Create a Subdomain in cPanel?