Positive reviews can, of course, boost business, but the analysis proves that negative feedback can have a direct fiscal drain on companies. For example, 86% of potential customers said they would think twice about buying a product from a firm with bad online reviews. What’s more, an extra star on reviews creates a 5% to 9% average rise in revenue for a business, while just one negative review could result in a company losing approximately 30 customers. Receiving positive reviews online translates directly into sales.