That fields are logically the anchors to identify the type if that document. It can be any text that can help you to distinguish the documents and help in classify them into one of the document type.
There’s a documentation that gives you the information on this
Thank you for the answer, but I still don’t understand how to use it (the documentation has little information).
Is this used to classify the documents? If it is, how can I access this information in Studio?
Should the Classification Field name be the same as the ones in the Taxonomy?