A good time for engaging marketing managers is when we notice that our own forces do not achieve the desired results with the sale through site and social networks. In doing so, we have 2 basic options, to engage a marketing agency, or a fee. We consider that the fee is an absolutely better choice, because if you find the one you need and who is right for you, you will suffer significantly less costs and you will get a dedicated and responsible person you are the only or one of a few clients, unlike agencies that are equally important , and which have dozens of clients.