For configuring the nopCommerce site on your IdP, you have four options:
Metadata URL - The Metadata URL provides the nopCommerce Site SAML Metadata information that can be used to configure the application in the IdP as an SP in one go.
Metadata XML as file - This file contains all the information about the SP in XML format. If the IdP supports importing the metadata from a file, then you can configure the application on your IdP in minutes by just uploading this metadata file.
Metadata XML as text - If your IDP supports to put metadata as text then you can use this option.
Configure IDP manually - You have the option of configuring your IdP manually using the SP URLs displayed in the “Service Provider Settings” tab. You will need to copy and paste the required URLs from the table into your IDP SAML Configuration to add the application as a SAML SP.