A tag is an arbitrary text string associated with a namespace. You can associate up to ten tags with any given namespace, and you can use the same tags for multiple namespaces.
You can use tags to group namespaces and filter namespace lists. For example, if you’ve created multiple namespaces for a company named ABC Corporation, you could associate the tag ABC with each of those namespaces. Then you could filter a list of namespaces to display only the namespaces with that tag.
You can associate tags with a namespace when you create the namespace or at any time thereafter. You can also remove tags from a namespace at any time.