Taxonomies have been in use for a long time on e-commerce websites. They help users find the products they want to buy by means of organized categories and subcategories of product types, and the feature of filtering by product attributes. In fact, when we explain taxonomies to those new to the concept, we often reference the e-commerce websites, such as Amazon.com, with which they are likely familiar.
Companies that sell products, however, can further improve product management and sales if they implement customer-facing taxonomies along with other semantic structures, such as metadata sourced from other systems and ontologies, as a part of a larger information/data management strategy.