We gave a small daily budget a very large audience and let it run. The platform spent the budget, just not on the people we wanted.
What happened
With little budget and a huge audience, delivery spread thin and the campaign had too few results to learn who converts. Leads were cheap and rarely qualified.
What worked instead
A narrower audience built from past customers and site visitors, on the same budget, produced fewer leads that were far more likely to book a call.