Single Source of Truth – Definition

The principle that a given piece of content or data has exactly one authoritative, centrally maintained origin from which all other uses derive.

A single source of truth for product content eliminates the inconsistency that arises when the same information is maintained separately across a store, marketplaces, and apps — every downstream channel reads from, rather than duplicates, the source. Establishing one in practice usually means picking, deliberately, which system owns which category of data — the PIM owns structured product attributes, the CMS owns editorial content, the commerce platform owns pricing and inventory — rather than allowing any category to be edited in multiple places, since ambiguous ownership is what causes a single source of truth to quietly degrade back into duplicated, conflicting copies over time.