To create a subdomain in your cPanel account, follow the next steps.
1. Log into your cPanel > Domains section > Subdomains menu:
2. Enter the following details for your subdomain:
Subdomain: the name of your subdomain
Domain: choose the domain name you wish to create a subdomain for from this drop-down menu
Document Root: the root directory for your subdomain (for example, it can be /public_html/subdomain)
3. Click on Create:
NOTE: the newly created subdomain should be available online within 5-10 minutes. However, it may take up to 30-40 minutes for the newly created record to fully propagate worldwide.