Blended ACoS is the percentage of ad spend to total sales – not just advertising attributed sales. It’s vital that you look at the relationship between attributed sales and organic sales to determine the efficiency of your Amazon Advertising and to inform future marketing campaign decision making. For example, if your ad attributed sales and organic sales are increasing at a similar rate, it proves the effectiveness of your advertising and that there is room to grow your ad budget and expand your reach. However, if your attributed sales are growing, but your organic sales are decreasing, it highlights that your Amazon Advertising may be cannibalising your organic sales. While some marketing agencies will make the mistake of focusing on regular ACoS alone, our experience and expertise can help you to utilise blended ACoS to gain a better understanding of the impact of your Amazon pay-per-click marketing to ensure that your strategy is delivering growth of both your attributed Amazon marketing and organic sales.