Using a voice of the customer (VoC) tool is the most critical element to retain happy customers and turn potential customers into loyal customers. But what exactly is VoC, and what are the best tools to explore to improve your customer relations and increase profitability? VoC is an aggregation of the attitudes and beliefs that your customers hold about your brand. This shouldn’t be confused with customer feedback, a direct source of information which constitutes just one element of the VoC mix.