# Tagging keys
<a name="tagging-keys"></a>

In AWS Payment Cryptography, you can add tags to a AWS Payment Cryptography key when you [create a key](create-keys.md), and tag or untag existing keys unless they are pending deletion. Tags are optional, but they can be very useful.

 For general information about tags, including best practices, tagging strategies, and the format and syntax of tags, see [Tagging AWS resources](/tag-editor/latest/userguide/tagging.html) in the *Amazon Web Services General Reference*. 

**Topics**
+ [About tags in AWS Payment Cryptography](tags-about.md)
+ [Viewing key tags in the console](manage-tags-console.md)
+ [Managing key tags with API operations](manage-tags-api.md)
+ [Controlling access to tags](tag-permissions.md)
+ [Using tags to control access to keys](tag-authorization.md)