The four axes
Product type, tag, collection and metafield each answer a different question. Type describes what the object is. Tag is a flexible label for filters and automation. Collection is a browsable group. Metafield is structured, typed custom data. Overlap causes drift — using a tag where a metafield belongs is the single most common cause of tag sprawl. Discipline pays off for years.
Growth stages
A 200-product catalog and a 20,000-product catalog need entirely different structures. Guides in this cluster cover both ends: the tight, manual approach that works below a few hundred SKUs, and the rules-driven, metaobject-backed approach that keeps large catalogs navigable.
Tag taxonomy hygiene
Because tags have no schema, they accumulate typos, casing variants and orphans until filters and automated collections quietly stop working. Periodic cleanup is not optional — plan a quarterly tag-audit rhythm and stick to it.