Lookalike audience

A lookalike audience is a prospecting segment modeled from a seed list (purchasers, leads, site visitors) so the platform finds new users with similar attributes. Quality depends entirely on the seed: polluted seeds (all visitors, one-SKU buyers) produce broad, expensive audiences. Refresh seeds after major promo periods; exclude existing customers when the goal is new-customer acquisition.

Meta % lookalike sizing trades reach for similarity; smaller % is not always “better” if CPM becomes prohibitive.