Answer:The answer is Deep customer knowledge
Explanation:
Deep customer knowledge is a kind of research done by a business in order to know the need of their customers and how the business can help in meeting such need.it is a process of engaging with their customers with a view to know their need so as to ensure that the overall objectives of the business is accomplished. Deep customer knowledge enables a business to build a strong relationships with their customers. The use of deep customer knowledge includes the use of customers service officer to explain to their customers the use of their products or services in order to ensure that they are able to satisfy their customers and improve the sales of the business.