A subdomain is a subsection of your website that can exist as a new website without a new domain name. Use subdomains to create memorable URLs for different content areas of your site. For example, you can create a subdomain for your blog that is accessible through blog.example.com and www.example.com/blog.
1. At the subdomian field, enter the name for your subdomain.
2. At the domain field, select the domain
3. The document root will be automatically generated with the subdomain name. The system will create this folder for you
4. click create