Subdomains refer to certain Internet pages; the content of these pages is stored in a separate folder in your Parallels Confixx home directory on the server.
To create a subdomain:

The directory / is your main directory on the server. The directory which has the following format: /folder is a sub-directory in your main directory.
Note: The target directory you specify when creating a subdomain must already exist on the server.
You can also link your domain(s) to a different Internet page (http://...) by specifying the respective URL in the Target field.
If you need to enable SSL for the subdomain you're setting up, tick the SSL box. If you want your browser to automatically switch from http:// to https:// for this subdomain, tick the http - > https box as well.
Note: By "SSL" here we mean the common shared SSL certificate registered for Parallels Confixx.