Why does harnessing the power of review sites in your marketing strategy makes good sense? Because us humans love the opinions of others when making a purchase decision. In fact, the majority of customers (some say up to 81%) read online reviews before making a purchase decision. Or is that 72%? Hang on, I think it’s 81%. Whatever it is, it’s high. And if you’re not listing your business on review sites, then you just might be leaving money on the table.