You need Amazon Tracking ID (or 'Affiliate ID' or 'Associate ) to track and get a sales commission from Amazon. To get Amazon Affiliate ID you need to join the Amazon Affiliate Program - it's free.
Here is the link to getting started - https://affiliate-program.amazon.com
Select your country-specific Amazon Affiliate Program and signup. Once inside the dashboard, you will get your Affiliate ID.
Lastly, save the Affiliate ID in the settings-->Button section of Connectr dashboard.
Thereafter, all the sales generated will be credited to you.