Tipo de comunicación comercial en la que se solicita permiso a los consumidores antes de enviarles publicidad. De tal manera, el permission marketing tiene tres características principales:
A wonderful serenity has taken possession of my entire soul, like these sweet mornings of spring which I enjoy with my whole heart. I am alone, and feel the charm of existence in this spot, which was created for the bliss of souls like mine. I am so happy, my dear friend, so absorbed in the exquisite sense of mere tranquil existence, that I neglect my talents. I should be incapable of drawing a single stroke at the present moment. I throw myself down among the tall grass by the trickling stream; and, as I lie close to the earth. Thousand unknown plants are noticed by me. When I hear the buzz of the little world among the stalks, and grow familiar with the countless.