I believe if you mix two audience targets of the same type (like 2 affinity audiences) it works like an OR rule but if you target two types of audiences in the same campaign, a user would have to meet both criteria to be served an ad.

Is that also true if I layer an affinity audience with a customer list (that they need to be in both audiences)? Or does it serve to the customer list but also to people not on the list in my selected affinity audience?

submitted by /u/ImaginaryLoquat6203
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