Re-identification controls whether and when a contact can be identified again after an initial match.
For Web Campaigns, this setting determines if and when a person is re-identified when they return to the client’s website.
For Search Discovery campaigns (B2C or B2B), this setting determines if and when a person is re-identified if they perform the same qualifying search again.
Re-identification rules are configured on a campaign-by-campaign basis, meaning each campaign can apply its own re-identification logic independently.