🏷️Custom Label Setup

After you have defined the basic details, limits and goals, and parameters for clusterization, the next step in the Cluster Designer is setting up the Google Custom Label. This setting is key for transferring the resulting segmentation from Karsa Labelizer to your Google Ads campaigns.

What is a Custom Label and Why is it Important?

Custom Labels are attributes custom_label_0, custom_label_1, custom_label_2, custom_label_3, and custom_label_4 that you can define in your product feed in Google Merchant Center (GMC). They allow you to add your own specific labels to products, which you can then use for:

• Segmentation of products in Google Shopping campaigns: Dividing products into different ad groups or campaigns based on the Custom Label value.

• Segmentation of listing groups in Performance Max campaigns: More detailed targeting and management of products within PMax.

• Reporting and analysis: Filtering and analyzing product performance according to your own segments.

Karsa Labelizer uses one of these Custom Labels to assign each product in your clusterization an identifier of the cluster to which it was assigned. For example, all products in "Cluster 1" will get the value XY_1, products in "Cluster 2" will get the value XY_2, etc.

Settings in Karsa Labelizer

In the Cluster Designer, you will find the following fields for Custom Label configuration:

1. Custom label

• What it is: Here you select which of the five available Google custom labels (custom_label_0 to custom_label_4) you want to use for this specific clusterization.

• Recommendations:

  • Check in your Google Merchant Center which Custom Labels you may already be using for other purposes to avoid conflicts.

  • If some labels are free, select one of them. If you are already using all of them, you will need to consider whether you can free up one of them for Karsa Labelizer, or whether existing usage can be combined.

  • Each clusterization in Karsa Labelizer that is to be active and export data to GMC typically needs its own unique (or shared, but carefully managed) Custom Label slot, if their values are not to be overwritten.

2. Prefix for custom label

• What it is: A short text string (prefix) that is used at the beginning of the value written to the selected Custom Label. This prefix serves to identify and distinguish values coming from Karsa Labelizer and a specific clusterization from other possible values in your Custom Label.

• How it works: For example, if you enter karsQA as a prefix and Karsa Labelizer creates clusters number 1, 2, 3, then it will write values such as karsQA_1, karsQA_2, karsQA_3 to the selected Custom Label for products in these clusters.

• Recommendations:

  • Choose a short but descriptive prefix that you can easily recognize.

  • It can contain, for example, your company identifier or clusterization type (e.g., mycompany_, roas_opt_).

  • Avoid special characters or spaces that could cause problems in Google Merchant Center or Google Ads. Use letters, numbers, and possibly underscore _.

• Importance: The prefix ensures that values from Karsa Labelizer will be unique and will not collide with other values you might be using in that Custom Label. It also makes it easier for you to filter and work with these values in Google Ads.

Example

• You select Custom label: custom_label_0

• You enter Prefix for custom label: TopPerf

• Karsa Labelizer creates 3 clusters.

• Products in the first cluster will get the value TopPerf_1 in the custom_label_0 attribute in GMC.

• Products in the second cluster will get the value TopPerf_2.

• Products in the third cluster will get the value TopPerf_3.

You can then use these values (TopPerf_1, TopPerf_2, TopPerf_3) in Google Ads to create separate product groups or campaigns.

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Proper Custom Label setup is essential for the successful transfer of segmentation information from Karsa Labelizer to Google Merchant Center and subsequently to your advertising campaigns. In the next section, we will look at how to set up Product Dynamics Management.