A taxonomy is a system or framework for organizing and classifying objects or concepts according to their characteristics or attributes. In the context of advertising and marketing, a taxonomy can be used to categorize and organize different types of products, services, content, or audiences, in order to make them easier to understand, navigate, search and target. In the digital advertising industry, taxonomies are intended to help improve the efficiency and effectiveness of ad campaigns by providing a common language and framework for advertisers, publishers, and technology providers.