Advanced Custom Taxonomies has the ability to allow post authors to assign custom fields to a term. This arbitrary extra information is known as meta-data. This meta-data can include bits of information, for example:
Let’s imagine we are having a event on your school library about books. Each book has it’s on Book Category ( Custom Taxonomy ) and each Book Category needs to be replaced by others from the library on different dates. Book Category can also be focused more to a male audience and we also want to give them a different priority than other book categories so we’ll have the following meta for a book category:
End Date: 10-10-2014
Term Meta-data is handled with key/value pairs. The key is the name of the meta-data element. The value is the information that will appear in the meta-data list on each individual post that the information is associated with.
You can re order your meta fields any time by simply dragging and dropping meta fields.