When you’re working on a content piece in Publish you’ll find Tags. This is where you add the tags you wish to use for your content and also where you create new ones. Just enter the name of your tag and click the Enter tab and it will be added to your content piece. Once you’ve published your content, the tag will be saved in your newsroom so you can use it in more releases in the future.
You will find all your tags in Tag Management in Settings.