Audiences that are activated to DSPs and DMPs can now be expanded to include additional accounts (D-U-N-S Numbers) within the family tree. Accounts that can be added for audience expansion share the same domain as the account in the target segment in D&B Lattice. Audience expansion is a helpful when your campaign aims to cast a wide net and reach as many targets throughout as many entities in your target's corporate family tree with the same domain.
To enable audience expansion for your digital ad campaigns, check the box in the campaign launch window to "Include all the accounts in the DUNS hierarchy with the same domain name as target account in the segment".
Note: Audience expansion is available in D&B Ads Manager, Google DV 360, Xandr, Trade Desk and Yahoo connectors.