JWT
These two keys are required for using the templates gallery and also the createX editor features. If you only want to use the createX features, you only need the first key (JWT Secret Key).
JWT Secret Key
This is the Secret Key, which is needed on jwt.io to decrypt the token. This key needs to be identical to the JWT key in the Magento printQ settings.
PrintQ API Key
Generated key from cloudlab for the connection to the API Gallery.