The Item Description for the package or service does not have tags.
Solution
Click the Item Description tab and provide one or more tags in the Tags field before sharing a package or service.
More information
When sharing a package or service, it is important to provide tags for your package or service so that end users can easily search and find it. Tags can be added by accessing the Item Description page in the Geoprocessing Package or Service Editor window and populating the Tags field.