Amazon ACoS: Is It Key to Your Amazon Ads Performance?
Amazon ACoS or Advertising Cost of Sale is a great tool within Seller Central to gauge if your PPC efforts are adequate and your campaign is built correctly. It tells you if you have enough well-performing keywords and the bids are set right to generate extra sales at a reasonable marketing mark-up per unit.
Plus, it broadly indicates how effective your Amazon product listing is at selling the actual products.
Comparing Amazon ACoS with scales (the one with two arms) is a rather dramatic visualization but a very accurate one. ACoS value is derived from two crucial sets of data collected by Amazon for any PPC keywords: Ad Spend and Ad Sales.