Which property is NOT part of a Liquid metafield?

In the context of Liquid metafields, the properties that typically define a metafield include Type, Value, and Namespace. The Type property indicates the data type of the metafield, such as string, integer, or JSON, which helps in defining how the value is to be treated. The Value property holds the actual data that is stored within the metafield, representing the information you want to keep related to a product, collection, or any other Shopify entity. The Namespace serves as a categorization mechanism, allowing for organization and avoiding conflicts between metafields that may have the same key but belong to different contexts or functionalities.

ID, on the other hand, is not considered a characteristic of a metafield in the same context. Instead, it is often more associated with the identification of the metafield itself in the database rather than a property defining its behavior or usage within Liquid. Therefore, it does not fit into the same framework as the other properties, which are crucial for defining how metafields should be utilized within templates and data structures in Shopify. This distinction clarifies why ID is not included among the core properties of a Liquid metafield.