Custom label 0–4 [custom_label_0–4]

• When to use
• Format
• Minimum requirements
• Best practices
• Examples

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When to use

Optional for each product

If you advertise your products through Performance Max or Shopping campaigns in Google Ads, use custom labels to group products for reporting and bidding.

The custom label attributes are numbered 0–4:

• Custom label 0 [custom_label_0]
• Custom label 1 [custom_label_1]
• Custom label 2 [custom_label_2]
• Custom label 3 [custom_label_3]
• Custom label 4 [custom_label_4]

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Format

Follow these formatting guidelines to make sure Google understands the data you're submitting. Learn when and how to submit your product data in English

Type	String (Unicode characters. Recommended: ASCII only), not case sensitive
Limits	1–100 characters, up to 1,000 unique values account-wide for each custom label attribute (up to 5,000 labels total)
Repeated field	No, but you can create up to five custom labels numbered custom label 0 [custom_label_0] through custom label 4 [custom_label_4]

 

File format	Example value
Text (TSV)	summer
XML (Feeds)	<g:custom_label_0>summer</g:custom_label_0>

To format your data for Content API, see the Content API for Shopping resource.

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Minimum requirements

These are the requirements you'll need to meet to show your product. If you don't follow these requirements, we'll disapprove your product and let you know in your Merchant Center account.

• Submit only 1 value for each custom label attribute.
• Create up to 1,000 unique labels for each custom label attribute across your account (up to 5,000 labels total, 1,000 labels per attribute). If you submit products with a custom label after you exceed the limit, those additional labels won't be taken into account for both reporting and bidding. Product group membership of products submitted with additional labels after the limit was exceeded will be evaluated as if the additional label wasn't set. To fix the issue, reduce the number of unique labels, and then resubmit your product data.
• Use the custom label attributes for Performance Max or Shopping campaigns only. For Display with dynamic remarketing campaigns, use the product grouping label for Display ads [ads_labels] and product grouping for Display ads [ads_grouping] attributes.

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Best practices

These best practices can help you go beyond the basic requirements to optimize your product data for performance.

• Create up to 5 custom labels for each product: custom_label_0 through custom_label_4
• Choose your own definition for each of the 5 custom labels. You can add the values to each product in your Merchant Center account based on your definition.
• Use feed rules to assign custom labels automatically based on values you already submitted in your product data. For example, if you want a custom label to represent different price ranges, you could set a rule that automatically applies a certain value to custom_label_0 based on the price range. For example, you might use the following labels: 0-5, 5-10, 10-20, 20+.

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Examples