A subdomain is a domain that is part of a larger domain; the only domain that is not also a subdomain is the root domain.
It's 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
In this tutorial, we’ll show you how to setup a subdomain.
1) Login to your Obsidian Hosting Account
2) Access cPanel
3) Once in cPanel, scroll down under Domains and click Subdomains.
In this tutorial, we’ll show you how to setup a subdomain.
1) Login to your Obsidian Hosting Account
2) Access cPanel
3) Once in cPanel, scroll down under Domains and click Subdomains.

4) On the Subdomains page, simply give the subdomain a name, select the domain and define the Document Root folder. After this is done, click Create.
5) The subdomain is now setup and can be viewed at subdomain.yourdomain.com.