Supplying product references is the first step that the sales rep should take to address a customer's questions about thefeatures of one product they are evaluating. Product references are testimonials or case studies from existing customers who have used the product and can vouch for its features and benefits. Product references help to answer questions, provide proof points, build trust and credibility, and influence purchase decisions.
References:https://www.salesforce.com/resources/articles/customer-stories/#customer-stories-definition