The document discusses evaluating the effectiveness of advertising investments. It covers: 1. ROI evaluation considers investments (costs), returns (results), and time (timeframe to achieve results). These factors are often underestimated. 2. Effectiveness is also measured by evaluating the efficiency of individual communication tools/channels. 3. Key recommendations are to fully account for all investments, simultaneously measure sales and brand metrics returns, leverage time as an ally, and differentiate key performance indicators for management versus technicians.