Quote by John Wanamaker
Half the money I spend on advertising is wasted; the trouble is I don't know which half.
Summary
This quote, often attributed to John Wanamaker, refers to the challenge of measuring the effectiveness of advertising. It implies that while a significant amount of money may be invested in advertising, it is difficult to determine which specific half of the expenditure is ineffective. This highlights the lack of precise data or metrics in determining the impact of advertising campaigns, underlining the inherent uncertainty and inefficiency in the advertising industry.