Honestly, I think the best way to market, for example, myself as a fitness coach, is through client referrals,  the problem is, it's so difficult to get them to give you one!? If you have a product I think Instagram can be a great way to reach thousands of people through an ad campaign. It seems to be the best platform for new products and exposure.  Any suggestions in my field out there, do incentives or any other methods work for a referral?