What audiences could I use on facebook to target people most likely to buy a [what the product/service is], here are some examples of audience sources: – Thought leaders – Tools – Publications / TV / Music / Websites – Associations / Certifications – Tangential Interests (Example: new offer for male health to high earners: Audience of Productivity AND health Stack AND Business/Entrepreneur Stack) – Engaged Shoppers, FB Page Admins, Parents.