The Modern SharePoint experience, which is now available in SharePoint Online as well as SharePoint Server 2019, has brought a breath of fresh air to intranet users and designers. However, site creators are still faced with the age-old question: Which type of site do I create? (For information about creating sites, check out Create a Team Site in SharePoint Online and Create a Communication Site in SharePoint Online.)
My first assumption was that a modern Team site URL would use /teams and a modern Communication site would use /sites. But that’s not the case. Thanks to a drop down box in the SharePoint Admin Center Settings, the URL for the new site will contain “/sites” or “/teams", with the former being the default option. This means you can have a modern Team site with an Office 365 Group at https://mytenant.sharepoint.com/sites/example.
So how can site creators choose /sites or /teams without giving them permission to the SharePoint Admin Center? They can’t. However, they can fill out a custom form, which can be connected to the See other options link when creating a Communication or Team Site.
The first step to connect the site request form is to go back to the Settings in the SharePoint Admin Center. In the Site Creation section, there is a checkbox for “Use the form at this URL.” Checking the box and entering the URL of a form will allow site creators to “create sites from a custom form” and then “access the form by clicking See other options when they're creating the site.”