You need Amazon Associate tracking ID to track and receive sales commission from Amazon. To get Amazon tracking ID you need to join Amazon Associate Program - its free.
Here is the link to getting started - https://affiliate-program.amazon.com
Select your country specific Amazon Associate Program and signup. Once inside the dashboard you will get your tracking ID/affiliate ID.
Lastly, save the tracking ID in the settings section of Super dashboard.
Thereafter, all the sales generated via your widgets will be credited to you.