Thanks! I've been working on audience definition, and was planning to try to refine as we get into more granular testing. We don't have any social account linki

Thanks! I've been working on audience definition, and was planning to try to refine as we get into more granular testing. We don't have any social account linking to avoid that friction point, so our visibility is limited. Any tips on getting audience insights? Do you have any thoughts on cost & value of CPI vs CPC vs CPM?