Updated: Nov 21, 2019
Amazon Advertising Certification: If your goal is sales efficiency, you should consider decreasing bids on keywords with high ACOS.
One of the main metric for sales efficiency campaigns is the ACOS (Advertising cost of sales). It is calculated as the percentage of Ad spend (In Rs.)/Sales (In Rs.).
So, if your goal is sales efficiency, then you should decrease bids on keywords with high ACOS. This will reduce the amount you are spending on high ACOS keywords.
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