IMPORTANT: You must be eligible for Merchant Promotions and have the program enabled in Merchant Center.
Submit the Merchant Promotions Interest Form
Once enabled, you will need to Create a Promotion in your Merchant Center account using the Promotions Tool
Using the Promotions Tool in Merchant Center
Upon being approved for Merchant Promotions, you will now be able to access the Promotions Tool in your Merchant Center account under Marketing > Promotions.
Click the blue + icon to start:
Start by selecting the Country - all other fields should populate automatically based on your inherent account settings
Scroll down to select your Promotion category and Promotion Type
Next, scroll down to find and set up the actual Promotion details and then click Continue
In the next section you will provide the Title of your Promotion and the Promotion ID. Your Promotion ID will be used to add to products in the later steps of this guide.
In this section you will also be able to select how to apply the Promotion to products in your feed and campaigns
If the promotion applies to all products, simply select that option and you will not need to apply Promotion IDs in your feed
You are limited to custom filters that you can apply:
Scrolling down further, you will be able to provide an actual redeemable code which will be displayed to customers in your Shopping Ads
Additionally you can set the Start and end dates of your promotion
To submit your Promotion for review by Google, click Save
Adding Promo IDs: Feed Rules
Our Merchant Promotions Add-on for Google Shopping allows you to set promo IDs on products using Modify Products.
After purchasing the add-on, use Feed Rules to build your rules:
Start by selecting Promo IDs as your attribute and then click Add Rule:
Next, your rule type should be set to Text Attribute Builder where you will enter the promo ID set up in Merchant Center:
If you are only adding this ID to specific products, you can use a filter to determine which one's (If applying to ALL PRODUCTS, do not use a Filter at all):
For Product Channels, make sure to only have Google selected and then click Save.
Lastly, head back to the Feeds tab, and click "Send Feed" to submit your changes to Google Merchant Center.
You can use the preview table at the bottom to ensure your IDs are implemented correctly, however to finalize any changes you must send your feed to Google. It may take up to 2 hours for Google to process your modifications.