You will need to know the amount of income produced by your campaigns and your advertising expenses in order to calculate the ROAS. Here is the equation:  ROAS % = Revenue from campaigns / advertising costs x 100  Consider implementing the target return on ad spend (ROAS) flexible bidding approach if we use conversion tracking and have established conversion values. While attempting to attain an average return on ad spend equal to the objective, this bidding approach might assist you in increasing the conversion value.