Definition
A product taxonomy is the hierarchical classification system that organizes products into categories and subcategories, giving every product a consistent place so it can be browsed, filtered, and matched to search and AI queries. Each category also implies the attributes a product in it should have.
Key points
- It is a hierarchy of categories, from broad to specific.
- Each node implies an expected set of attributes for products in it.
- It is related to, but distinct from, the attribute schema.
- Standard taxonomies (Google, GS1) exist; many teams keep a custom one and map to standards.
How is a product taxonomy used in practice?
Products are mapped to nodes in the category tree, and each node's expected attributes drive completeness checks and filters. A good taxonomy mirrors how buyers actually search, stays shallow enough to navigate, and is consistent enough that the same product type always lands in the same place.
Common pitfalls
- Trees that are too deep to navigate or too shallow to filter.
- Inconsistent categorization, so similar products scatter across nodes.
- Not aligning attribute requirements to categories.
FAQ
What is the difference between taxonomy and categorization?
Taxonomy is the structure — the defined tree of categories and subcategories. Categorization is the act of assigning each product to the right node in that tree. You need a good taxonomy first, then accurate categorization against it.
Should you use a standard or custom product taxonomy?
Standard taxonomies (such as Google Product Taxonomy or GS1) help with channel and marketplace compliance, while a custom taxonomy can better match how your buyers shop. Many teams maintain a custom internal taxonomy and map it to standard ones for syndication.