If you don't want to register additional domain names,then you can use subdomains to host additional websites or parts of a website. Subdomains work using one of your existing domain names and a prefix. So, for example, we could create a subdomain on example.com called demo.example.com.
If your hosting package allows you to use subdomains, you can add one by following these steps:
1. Login to your Plesk control panel
2. Click Websites & Domains
3. Click on Add Subdomain
2. Enter the subdomain name that you want to create and also define the document root of that subdomain.
3. Click on OK
once you have entered the details.
4. Click the subdomain to edit it.
- There you will be able to change subdomain name and document root.