If a company intends to sell a new product to any potential customer, this customer needs to know about that. The propaganda activities, in general, have this purpose, to announce products and services. If someone intends to announce something to his target customers, he has different medias available, like radio, TV stations, newspapers, magazines, posts, billboards, blogs, web sites, etc. However, to be successful, it is necessary to take care about some details. First of all, the company has to select the best media channel, with highest probability to access the target group. You should not post an ad in a fishing equipment’s magazine if you work with software’s development and vice-versa.