You can assign any number of tags to your products – both on produvt and revision level. The Tags ca be edited using the Product Manager (Control Panel > Products > Product Manager).
To add or delete tags associated with a product, find your product in the products list, either by scrolling the list or using the column filter. Once the product is selected, you can edit the product tags by selecting the TAGS-tab. To specify tags for a specific revision, select the revision in the revisions list. Then select the TAGS-tab.
By clicking New tag in the ribbon, a new line appears in the tags-list. Select the tag you want to set, and set the desired value. Click Done to save.
Edit Tag-list (Tag Manager)
To add custom tags to the list of available tags, click Tag manager in the ribbon. This will bring up a dialog for adding and deleting tags.