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Unify Individuals or Accounts with an External Link
Matching on an external link lets you unify profiles that have been identified as matching in an external data source. Your source data must include an ID that identifies the matched records.
Matching based on external links improves profile matching in complex situations by ensuring that records stay linked even if attribute data changes. For example, match an anonymous user profile to a logged in user profile by contributing the link during the browser session. Or, add identifiers to source profiles to unify profiles that wouldn’t normally match based on regular rules.
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