How to Create Supplement Feed in Google Merchant Center

Introduction

Supplement feeds are a great way to optimize your Google Merchant Center feed. Supplement feeds allow you to update your products in bulk, which is a time saver for marketers and helps you avoid having to make individual changes to each product in your feed. With supplement feeds, you can make changes in one place (e.g., update prices, quantities, titles, and many more attributes) and have them applied across all products at once or individual products you select.

What Is a Supplement Feed?

Supplement feeds are files that contain additional product information, such as inventory levels and sales data. They can be used to optimize your Shopping campaigns by providing more accurate information about your products.

• A supplement feed is different from a product feed in that the former contains additional data about products (such as inventory levels), whereas the latter includes all available information about each product: name, description, price and so on.
• Supplement feeds are used to add more information to the product data that is already in Google Merchant Center’s main feed.

Why Use a Supplement Feed?

You can use a supplement feed to add products that are not currently in your product data feed. For example, if you have an existing product data feed but need to change the prices of some items, create a new supplement feed with these adjusted prices and upload it to Google Merchant Center.

You can also use this feature to add virtually any other attribute or update that attribute of any product. For example, if you wanted to add “item group id” for products that have the same main product with 10 different variations, this would be a great way to add that attribute to better optimize your feed.

When Should You Use a Supplement Feed?

Supplement feeds are a great way to optimize your Shopping campaigns. Supplement feeds can be used to fill in gaps in your data, improve the performance of your Shopping campaigns and increase the volume of sales.

Supplement feeds give Google Merchant Center users the opportunity to optimize their Shopping campaigns.

Supplement feeds give Google Merchant Center users the opportunity to optimize their Shopping campaign feeds. Supplements are files uploaded into the supplement feed section that allow you to make updates to your feed in real time, giving you more control over how pages are displayed on Google Search and Shopping results pages.

Supplements can be used in many ways, but one of the most popular uses is for making bulk changes or adding missing attributes to products that have already been uploaded. For example, if you sell swimsuits in different variations and want the variations of products to show up under one product, you can use a supplement feed to add “item group id” that applies to only products that you mention in the “item ID’ section of the feed. This way, even though all of your products may have unique colors or designs, they’ll still appear correctly when someone searches for that product and customers will see all the available colors, sizes, designs, etc. because it will match with whatever was added by way of supplement feed!

Supplement feed can also be used to add additional information about products — such as size charts or return policies — so when anyone sees an ad for these items on Google SERPs (or other paid channels), there will already be some useful info provided

PS

This method should be used if your inventory data does not change much or if you don’t constantly add new items to your catalog. If you are always adding and removing new products, the best way would be to add Feed Rules to the main feed. It is a bit more technical method, but once feed rules are created properly, those rules would apply to all products that meet the criteria you specified eliminating the need to constantly update the supplement feed.