If ASINs are not driving sales in a campaign, what would an advertiser see in the advertising product report?

If ASINs are not driving sales in a campaign, it means that advertising spend is occurring without generating corresponding revenue. This scenario directly leads to a high ACOS (Advertising Cost of Sale). ACOS is calculated as (Ad Spend / Ad Sales) 100. If ad sales are low or zero while ad spend is still happening, the ACOS percentage will be high, indicating inefficiency. Low ACOS would imply that ad sales are high relative to ad spend, which contradicts the premise that ASINs are not driving sales.