Command to create and delete
subsites
Create site: The New-Sp Web
cmdlet creates a new site in the existing site collection specified by the Url parameter. You can
create a site with a specific default language by specifying the Language parameter. If
no language is specified, the site is created with the same language that was
specified when the product was installed. You can create a site from a specific
template by specifying the Template
parameter. If no template is specified, the site is created and the template
can be provided later or by the first user to log on
New-SPWeb http://expertsharepoint/subweb1 -Template "STS#0"
Delete site: Deleting the top level Web site of a site collection
causes the entire site collection to be removed
Remove-SPWeb http://expertsharepoint/subsite
Templates: You can find all the templates below.
I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.