Door To Door Marketing The benefit of this type of field marketing is that it can be done on a low budget, it is very cost effective and reaches a larger number of people per within a very short duration, in this short period of time where you have just a few minutes to convince the customers to take interest in your business, just a few minutes to build personal relations through five stages. By attention, interest, desire, conviction and action. Allows businesses to showcase their products in real-time, increasing the chances of customer interest and purchase.