Una vez creada una audiencia person aliz ada, similar o una lista de usuarios, ¿cómo se activa en una campaña de Display?

Once a custom, lookalike, or user list audience is created, it's activated in a Display campaign by selecting it from the Saved Audiences module within the line item. This is the correct approach because line items are where specific targeting parameters are defined for ad delivery. Associating it directly with the budget is incorrect as budgets define spending, not targeting. Configuring a new campaign from scratch is unnecessary and inefficient, as the audience is already created. The campaign administrator is a broader management tool, but the specific audience selection happens at the line item level for precise application.