Just how the advertising funnel works The earliest version of a sales channel that I have the ability to find is this from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Here, Dukesmith presented the idea of 4 phases that lead to a sale: Attention, Rate Of Interest, Need as well as Sentence. Virtually 50 years later, an advertising and also sales exec in the pharmaceutical sector, Arthur F Peterson, published the complying with picture in his book, Pharmaceutical Marketing, Detailing, as well as Sales Educating: