All content to be read is stored in standard SharePoint document and/or pages libraries.
If you have an existing site with content, this can be used to target and track content.
If you need a new site for test or production, create a SharePoint Communications site.
The default language of the site must be set to English. Other default languages are not support at this time.
It is recommended to create the site early in the setup as they can take up-to 1-hour to be fully ready for content.