What is a good ACoS? While it is legitimate to ask yourself this question, it is much more complicated to give a clear answer because each product offering and each company is different.
For example, if you sell consumables and you have recurring sales, your profitability objective for the acquisition of a new customer may be more flexible than for a merchant with a low purchase frequency, since you know that this acquired customer will become profitable only after several months.
To determine what is the ideal ACoS for your business you need to know the amount of your profit margin in order to determine your break-even point, that is to say, the maximum amount you can spend on advertising to remain in balance.
How to optimize your ACoS (or ROI) on Amazon? In order to maximize the profitability of your Amazon Advertising campaigns, you need to generate reports and analyze the different KPIs on a regular basis that will allow you to identify which campaign elements are performing and which ones, on the contrary, are not.