ROI of advertising
Half the money I spend on advertising is wasted, the trouble is I don't know which half.
Wanamaker was general manager of the items in the United States between 1889 and 1893, is known as the pioneer of marketing and advertising. p>
With this sentence he captures the essence of the measurability of advertising. p>
If he were still alive and observed the new digital world probably would change that statement. p>
Today We can say that in the digital field with a 95% probability we know what works and what does not. p>