The ROAS tells you how much you could anticipate earning from an ad campaign, and Amazon ACOS tells you the percentage of increase.
The ROAS tells you how much you could anticipate earning from an ad campaign, and Amazon ACOS tells you the percentage of increase. Both are measuring the same metrics, but the two calculations present the information in slightly different formats. It can be useful to look at both, though, to get a comprehensive view of how your ad campaigns are performing.
Amazon ACOS shouldn’t be the sole campaign metric you focus on. It’s merely one facet of advertising campaigns for Amazon sellers, and it doesn’t take into consideration the variables between different campaigns. For example, new campaigns tend to have a high ACOS, merely because of their newness. But that doesn’t make a new campaign a failure; it means you should consider different KPIs.