AI-generated Key Takeaways
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          CustomCriteriaNode represents a node within the custom targeting tree. 
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          A CustomCriteriaNode can be either a non-leaf node (CustomCriteriaSet) or a leaf node (CustomCriteria). 
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          The structure of the custom criteria targeting tree must adhere to the rules specified for Targeting.customTargeting. 
A CustomCriteriaNode is a node in the custom targeting tree. A custom criteria node can either be a CustomCriteriaSet (a non-leaf node) or a CustomCriteria (a leaf node). The custom criteria targeting tree is subject to the rules defined on Targeting.customTargeting.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202508
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