There are many kinds of companies, but they all have something in common: customers. And all customers have something in common: they have opinions. No matter what your field is, there is a clear relation between the number of customer reviews and the percentage of sales. This relation is pretty simple: more product reviews, more sales.
Did you know that 70% of customers go online to look for reviews about products or companies? A survey made by Opinea clearly showed how important product reviews are in purchase decisions.