A numeric score representing the quality or confidence of a digital identifier (hashed email, MAID, CTV ID, UID2, Trade Desk ID, etc.) as supplied directly by the data owner. The scale and direction (higher = better vs lower = better) vary by supplier — interpret values within a single supplier's data, not across suppliers. This score is not a probability but a convenience attribute for surfacing supplier-supplied quality and confidence ratings alongside the identifier itself.