product-categorization

Shopify uses Collections as its categorization mechanism. Create automated rule-based collections for your main taxonomy, then build the visual hierarchy by nesting menu items under Online Store > Navigation, since collections themselves are technically flat.

Install the free Yoast SEO plugin, which adds breadcrumb navigation automatically, or enable breadcrumbs under WooCommerce > Settings > Advanced. Set a primary category per product in Yoast so breadcrumbs show the correct path.

Use a materialized path model storing ancestor slugs in a path field and ancestor IDs in a pathIds array. This lets you fetch full breadcrumbs in a single query instead of recursive CTEs, and update subtrees transactionally when categories move.

Two to three levels is optimal for most stores, with four levels as the maximum. Deeper hierarchies confuse shoppers and dilute SEO; small catalogs under 200 products can use a flat structure with tags instead.

Category pages without unique descriptions are thin content that rarely ranks. Add 100-200 words of original text, a category image, an SEO title, a meta description, and a canonical URL pointing to the clean unfiltered category URL.

Yes. Export product titles and descriptions, use an LLM to suggest one to three category IDs per product, then import results via Matrixify or WP All Import. Always queue low-confidence suggestions for human review before publishing.