Just as Return On Investment (ROI), Return On Advertising Spending (ROAS) – also known as Return on Ad-Spend – is a metric used by digital advertisers.

It is useful to calculate the profitability of an online campaign. To do so, you will have to divide your ad’s revenue by its cost (revenue / advertising cost). If the result is less than one, your ROAS is negative, therefore in need of some tweaks.