After creating the catalog and importing the product feed, you will need to link it to your existing campaign/s so that you can begin to assign products to the User Generated Content. In order to get into the campaign settings, click on:
Campaigns > Click on an existing Campaign > Settings
From here you can link a catalog to the campaign. The "Link campaign to a product catalog" dropdown menu will allow you to select which product catalog you want to link to the current campaign .
After clicking on "Save settings", the “Assign products” button will be available for each image in the Media section of the Campaign you're in.
The next step introduces basic aspects on content moderation and assigning products to images.