For some reason, many companies believe that marketing ends once a prospect becomes a customer. However, this should never be the case. If you think about it, marketing to potential customers is a series of actions that a company performs to gain the customers’ trust and show them the value of the company. So, why on earth would you stop doing this after they’ve given you their business?
In fact, I would argue that marketing should increase in quality once the client is firmly in your camp. The reason to do so is to create brand evangelists, or the clients that love your product so much they discuss it with everyone.