WHAT WE REPORT
We report when was the last time your users logged-in to Salesforce. You can check the breakdown of the last logged-in date for all users and by each user profile separately.
ACTIONS TO TAKE
This will help you understand the adoption and usage of Salesforce in your organization as well to pinpoint these profiles that are infrequently used. In the Org Model you can run the "Salesforce last logged in" report which will list every user by their last log-in date in Salesforce. This will allow you to understand which users are not using Salesforce.