There are 3 options to add more SKUs for one ASIN: via the manual "new campaign" creation flow, campaign information edit, or via the bulk import.
Option 1: Via the "new campaign" creation flow
- Create a new campaign
Option 2: campaign information edit
Click on the campaign name
Scroll to the "Items to advertise" option and click on "+Add SKU"
Add the SKUs, each in a new line.
Option 3: Via the import functionality
Download the Excel template and fill in all mandatory information.
Add the SKUs in the SKU column, separated by a semicolon.
Save the Excel and drag it into the "Import campaigns" screen.
(Please find attached the bulk import excel.)