As the user, I want to use facets to refine their product search by multiple dimensions at the same time.

Faceted search is a more granular way to find products and results in a specific, targeted way that is not possible with broad, one-size-fits-all filters. 

Facets and faceted search are part of an optimised UI. Contextual facets that can change according to the item or the category drive a user-friendly experience by guiding the user down the quickest path to the best result.