CPA is one of the most important metrics for advertisers to keep track of because it indicates how much it would cost the company to attract new customers. Furthermore, marketers must decide if their actions are fruitful or whether their marketing tactics need to be tweaked.
CPA also provides a straightforward picture of the real Return on Investment, which is helpful in planning future budgets and assessing the progress of past investments and strategies.
It gives you information that will help you streamline your current marketing campaigns, making them more accurate, applicable, and impactful, resulting in more conversions and sales.