Product mapping is the process of mapping a channel product to a different master and channel SKU.

Here's how you do it:

Log in to your account and navigate to the "Fulfillment Center," then select "Products" from the drop-down menu.

Go to the top-right corner and click "Add New" to choose "Mapping" from the drop-down menu.

Download the sample sheet and remove the sample data and add your own product data before uploading the sheet. 

Finally, upload the file and then click Finish to proceed.