Net Promoter Score (NPS®) is a measure of a customer base's willingness to promote a product or service to colleagues and friends. It is based on the results of a current customer survey, which asks respondents to answer the following question: “how likely is it that you would recommend (brand or product X) to a friend or colleague?”
Responses, with 10 being the highest, are grouped as follows: 10s and 9s are brand ‘Promoters’, 8s and 7s are ‘Neutrals’, and any responses below 7 are brand ‘Detractors’.