The Signin tab provides following additional features:
IDP initiated login
The IDP initiated login process occurs when a user clicks on a link or button and is redirected to the Identity Provider for authentication. After being authenticated on the IDP side, the user is redirected to Service Provider.
This section of the tab lists the link of IDP initiated login corresponding to each configured SP.
Dynamic Relay State
Relay State is the URL on which the users are redirected after successful authentication. You can append a parameter in the SP login URL to set the dynamic relay state. You can find the format of the parameter expected by the module in this section.
The Enable logging checkbox enables reports under the Recent Logs tab. If an unexpected error occurs on your site, this functionality will assist you in debugging it.