Ability to assign temporary labels to products / listings so they can be filtered later by those labels

The ability to assign temporary labels to products or listings and be able to filter by those labels. For example, all listings that need price checking could be labelled as such and then can be easily filtered using that label at a later time or by another user to work through. Similarly, any products requiring description improvements could be labelled and easily identified later to be worked through. Labels could be unassigned from a product when no longer needed.