Which Attributes Can Be Used To Segment Google AdWords Campaigns?

Any of the attributes below can be used in an AdWords Shopping campaign to create product groups.

Category (google_product_category)
Item ID
Product type
Custom label 0
Custom label 1
Custom label 2
Custom label 3
Custom label 4
Channel exclusivity

If you are changing any of these values, whether during an initial feed build or during subsequent maintenance, you should be certain of whether the client is using these values in their shopping campaigns.

If your client is using Google Product Category to make product groups, then you will need to carefully coordinate any changes in Google Product Category with your client and make them aware the kinds of changes you are making. If you make these changes without letting your client know, then products will likely fall into different product groups, which could have negative consequences for the campaign.